When Alan asks Carl what year it is, Carl thinks he's asking about his car, and he said it was brand new. When Judy clarifies, she states the current year is 1995. Carl's car is at least three years old when this movie takes place, since the Chevy Caprice's skirted rear wheel wells were replaced with rounded wheel wells on models after 1992 so the car is not brand new.
When the game is played in the attic Judy tells Sarah that she can win if she rolls a twelve, but she only rolls a three. On her next turn Allen says she can win with a seven, however 12 minus 3 means she would have needed a nine.
When Alan drives the car for the first time we see him put the car into a slide around the corner and then correct the slide with opposite steering. This is an advanced driving technique beyond the ability of most drivers, let alone somebody who has never driven a car before.
There were 31 spaces on the game for each player from start to finish, main reason for other goofs mentioned in regards to this subject, but the biggest being Alan couldn't have finished when he did, since his rolls were: 5~?~7~3, and the second roll couldn't have been any higher than 11.
When the EMTs are pulling the woman bitten by a mosquito out of her car, she is wearing boots which come to mid-calf. In the next shot where they are putting her into the ambulance, her legs are bare and she is wearing pumps on her feet.
When the aunt flags down Carl to ask for a ride home, he's wearing his seat belt. When the vine attacks him and he has to jump out of the car, he does so without reaching over to unbuckle his seat belt.
When young Alan heads down the stairs of the factory to go face the bullies, he turns to look at the machine after Carl's shoe breaks it, and two ladies walk up the stairs. The shot cuts to Samuel demanding who is responsible, and when it cuts back to Alan, the same ladies walk up the stairs again.
When Aunt Nora backs into the door in awe of her house being covered in vines, the claw marks are returned again; after opening the door, discovering the lion, and closing it again, the claw marks have, again, disappeared.
When Mr. and Mrs. Parish in the beginning of the movie are leaving for the evening, they are in the car and talking for a moment and the car is not running. Then Mr. Parish has his left hand on the steering wheel and his right hand on the gearshift, and then the motor is started. He could not start the car without turning the key, and he does not have a hand on the key.
In the beginning of the movie, when Allen is fighting the lion, the kids are seen running behind him into the other room. Allen then traps the lion in that room and finds the kids hidden in the closet.
In the store scene, while the hunter is under the paint, the cop takes his gun. The gun is also seen in the cops car when he drives away. At the end of the movie, the hunter shows up with the gun in his hand.
When Allen opens the chest containing the board game, he reaches in and wipes some of the sand from the top. The scene cuts away and when the scene cuts back he lifts the game out, with the sand undisturbed.
When Alan handcuffs Carl to the police cruiser, he throws the car keys into the woods. Upon hearing of Judy, Peter and Sarah's location on the police radio, without retrieving the keys from the woods, he gets in the cruiser with Carl, starts the engine and drives away.
When Alan is startled by the grandfather clock and drops the dice, one die reads two, and the other, three. When his game piece starts moving in the next shot, it is apparent that neither die read two.
After Carl refills the master cylinder with brake fluid in his patrol car, the hood falls off after he shuts it, which reveals a round air filter element (which the Caprice never had this type) and then after backing out of the store, the correct square plastic box type air plenum appears.
When Allen is fighting the lion and traps it into one of the rooms, the lion scratches the other side of the door with his claws, leaving the door with large claw marks on door. When the door is shown again there is no claw marks on the left side of door nor on the right side either. There are only paw marks on the right side of door.
At the shoe factory in 1995, when Alan runs to his Father's old office, the writing on the door reads, "SAM PARISH PRESIDENT" and another identical door reading "SALES" is seen on the wall opposite to this door in the background. 20 seconds later when Peter and Judy Shepherd comes in to the room, the door of the room reads "SALES". Which means the they had actually entered the wrong room which was opposite to Sam Parrish's old Office.
After Allan pulls the chest out of the dirt, he brushes some dirt off the top, then pauses with his hands touching the lid. It then cuts to a close-up of his face in which much of the lid is also visible, and his hands are not there.
After Sarah gets rejected from the ATM, Van Pelt steals the game from Peter. In the rush, Peter steals it back and runs away. The driver of the second car (that almost hits him) appears to get out. However, after a cut scene of the stampeding animals, we see Peter run towards the open driver's door. As the camera turns, we see a foot under the door, which quickly retracts back into the car. The person is not seen inside the car, as Peter hides in the driver's seat as the animals crush the car.
All the animals in the herd of elephants, zebras, rhinos, and such seem to always stay together as they run at different speeds. Do the zebras and smaller animals constantly stop every now and then to let the others catch up?
In the scene after the brakes go out in the police car and it crashes into the store, the policeman simply refills the master cylinder with brake fluid to fix the brakes. The previous scene showed that there was a hole in the line that released fluid, which would cause the brakes to not work again, yet the policeman continues to use the brakes with no ill-effect.
(at around 25 mins) After Peter rolls a five which will release Alan, the message reads "His fangs are sharp, He likes your taste, Your party better move poste haste".
'Post haste', or 'post-haste' is an expression meaning quickly and is derived from markings on mail, it shouldn't have the 'e' at the end of 'poste'. However, the game is well over 100 years old, and spellings often change over time. Furthermore, this may be British English from the African continent rather than American English.
When the inside of the house is flooded as a result of the monsoon, the water level rises over halfway to the ceiling until Carl kicks the door and unwittingly releases the water out the front door. But it would have been impossible for the water to pool in such a great amount because there was already a massive hole in the wall from when the stampeding animals tore through the house. The water would have simply flowed out of the house instead of pooling at all.
The monkey is able to start the policeman's car by turning the key, and shift into (presumably) "drive," then he goes down in the seat to press the gas pedal. He is able to turn the key, start the engine, and shift into "drive" all without holding the brake pedal (he can't reach it until he moves down into the pedal area), which would be required for all three of these things in most automatic transmission vehicles.
Alan sank through the floor so that only his face was level with the floor. When Nora saw him hanging from the ceiling only his hips to legs were visible. This suggested that the cavity between the floorboards in the upper room and the ceiling in lower room was at least two feet deep which is unreasonable. However, this house is quite old, and building styles have changed considerably through time. It is reasonable for a mansion to have a 2 foot gap in order to allow for insulation between the levels.
The slow rhino seen at the back of the stampede at 1h 45m 4s was an animation error they left-in. An incorrect frame rate had been set for the element, making it run slower. They kept it in, whilst adding the foot stomp and wheezing sounds.
At the end of the movie when Van Pelt shoots Allen, the bullet never reaches Allen because it starts to disappear into the tornado along with the rifle that Van Pelt purchased at the store. Both the rifle and bullet are not from the game like the animals, Van, vines, therefore it should not have disappeared. However, it is shown that the game reverses the 26 year gap that was the result of playing the game, so the gun and bullet went away because time was going away as well.
At the end of the movie, the kids lock up Jumanji and throw it into the river. Jumanji was later found with no locks on it at all. However, the kids threw the game into the river in the year 1969. Presumably the final scene on the beach is set in the year 1995 as the previous "Christmas party" scene would indicate. It is entirely possible over the 26-year span ('69-'95) that the game had been found and played by others who didn't lock it up.
When the mosquito is on the windshield, Alan refers to it as "he". Only female mosquitoes bite, not males. However arguably, many people do not know this and considering Allan never even finished the sixth grade, it could be presumed that he didn't know either (or the other two children for that matter).
When Allan handcuffs Carl to the cop car door and begins to walk away, he throws the keys into the adjacent field. Alan then hears a radio call over the police radio of the hostage situation at the store. Allan runs back to the cop car, gets in and starts the car without retrieving the keys from the field. However, as Allan tosses them, Carl yells, "My handcuff keys!" indicating they were only for this purpose and that a different key starts the car.
When it is Alan's turn to roll the dice & the clue he reads releases Van Pelt from the game, he's afraid and terrified & calls Van Pelt by name as if these two characters have crossed paths during Alan's time trapped inside the game (which he probably has). Yet later when Sarah tells him that he could've told them that Van Pelt existed in the game and that he hunts people, Alan says "Well I didn't know, okay?! It's just a roll of the dice!", even though he clearly reacted with fear because he knew who/what exactly was about to come out of the game and come after him. However, he is clearly being sarcastic, most likely to move the conversation along so as to get back to the game.
It's strange that when the game is finished, all the wild animals (as well as Van Pelt) get sucked back into the game, yet the wild plants and vines don't seem to. (For that matter, we don't even see the pelicans, monkeys, spiders or crocodile inside the "tornado" either.)
While viewing the abandoned house in 1995 Aunt Nora tells the Realtor that her brother and his wife were killed in a car crash in Canada. Neither Alan nor Sarah were present to hear this important detail. However in the 'fixed' 1995 timeline at the Christmas party, both react in knowing horror as the children's parents discuss this same upcoming vacation trip. However, the children could have told Alan and Sarah how their parents died while they were walking from one catastrophe to the next.
When Carl is driving his cop car and encounters Nora running down the road, he stops and begins to talk to her. Carl is clearly wearing his seat belt. Nora alerts Carl of the plant coming inside the cop car and Carl exists the vehicle without removing his seat belt.