Goofs

In the hospital scene where Wray is searching for Cherry, he finds her by seeing her right boot next to her hospital bed. The infected tore off and took her right leg along the roadside, the leather boot was still on it.

At the end, when Cherry shoots the last infected in Mexico, the close-up shows she shot its head off down to the brain stem. But a split second later, when they show it fall to the ground, the head is (mostly) intact.

When Tammy's Volvo breaks down, she parks it just in front of the sign that says 'Military base'. In further shots, the car is quite far from it.

Dr Block, wearing white gloves, presses the black boil on his patient tongue, and it spits pus on his glasses. On the next shot, his white gloves show no trace of pus.

When Dakota lowers the rope to Cherry, Cherry just reaches up and grabs it, without even looking. A hovering helicopter produces as much downward thrust as its weight, otherwise it could not maintain height. Dakota was in a military helicopter, made to lift much more than its own weight. The smallest such would be a Eurocopter EC725. These types of helicopters produce so much downward force, and therefore "wind," that a rope would be blowing everywhere, difficult to grab by someone actively trying; it would not just hang in a near stationary position. Of course, as noted elsewhere, Tarantino and Rodriguez purposely 'bend realism' in the Grindhouse films to mimic the original style.

As 'Planet Terror' is an homage to the old, low budget Grindhouse films of the 70's and 80's, there are many deliberate errors by the filmmaker to give an authentic Grindhouse feel.

In the jail cell scene where Wray (Freddy Rodriguez) asks J.T. (Jeff Fahey) if he's alright, he holds his gun upside down while he fakes handing it to the guard, he then shoots the guard. He is holding the gun by the frame. The gun is a 1911 style pistol. A 1911 style pistol can only be fired by squeezing the grip safety on the back of the pistols grip. The gun would never have fired in this case. However, not all 1911 style pistols have the grip safety. More than one manufacturer has made a 1911 style pistol without the grip safety and there are plenty of people capable of pinning this feature on an original or replacing the frame for one without a grip safety.

Cherry's gun-leg does not appear to have a function to fire and change ammo, but the leg was designed in the company of a bio-mechanical engineer that clearly has capabilities beyond a rational reality, so the fact that she doesn't need to pull triggers or activate different weapons in the gun-leg is rational, given the context and scope of the movie, along with the obvious fact that the technical functions of the device were deliberately overlooked by the filmmaker(s) to keep the action pace of the "grindhouse" film.

At the last gun fight scene in the movie, Cherry fires more than 3 grenade rounds without having to reload. In fact, the M203 grenade launchers only have a 1 grenade capacity. It is however common in action movies, that characters keep shooting without reloading, so it was likely intentional, especially, that the film does not try to depict reality.

When the uninfected are escaping to the helicopters, the walls have wheels at the bottom of them, this is noticeable when one of the actors pushes back against them.

(at around 47 mins) When Dr. William Block is about to inject Dakota Block with the yellow and red syringes, it is quite obvious that there are no needles in the syringes. At the point when Dr. William Block removes the protective cover off of the syringe with his teeth the missing needles is evident.

In the scene where J.T. is lying behind the counter in the Bone Shack assumed dead by Wray and Sheriff Hague, as J.T. awakes up you hear him cycle a pump action shot gun. J.T. is clearly holding a double barrel shotgun which has no cycling action. "Double Barrels" have a break open action where the barrels tilt forward for loading and unloading of 2 rounds only.

When Dakota Block is trying to start her car by using her mouth to insert the key into the ignition, the reflection in the metal ignition shows a hand holding the key, not a mouth.

When Cherry uses her leg to shoot the Military/Zombie men, in one shot, she shoots 6 of them and they all have huge cables running behind them to suggest the squibs on them going off.

During the opening scene where Cherry is dancing there is a mirror in the background, in which, you can see the crew filming.

When El Wray is going to Cherry's hospital room after the outbreak, the fire on the walls are all fire-bars emitting the flames on the bottom.