When Ben is chasing A.J his gun is on his right side of his waist, but the scene after James looks down the alley to see were they are Ben's gun is on the left and just before A.J jumps on the trampoline when Ben appears his gun is back on the right...
When Ben and Cory are arguing about flowers and Ben gets hit in the head by the fan, his uniform shirt is untucked. In the very next scene, he is shown untucking his shirt to undress.
When Barber (Hart) and his entourage crash Antonio Pope's party, the pattern of Hart's 'Kente print" sash changes from when he enters the party, scales the outer wall, and leaves the party.
At the bachelor party at the club scene Ben is counting the number of shots the assassin fired. He counts to 15 and says the assassin needs to reload; the FN Five-seveN is known for its 20 round standard capacity and alternate 10 round magazine (for markets with capacity restrictions) there is no 15 round version.
At 30:50, during the foot chase scene, the flag of Saint Lucia can be seen on one of the bunting lines. The shade of blue is way too dark (the actual flag is a light blue ,similar to the flag of Nauru, in this scene between Antigua and Barbuda and Barbados, whereas the flag in the movie is a dark blue, similar to Puerto Rico's blue. St. Lucia's flag has never been this shade of blue.
The FN five-seveN firearm would be recognized by a metal detector.
When Port Commissioner Griffin receives the call from Antonio Pope at the beginning of the film; the time on his wall clock in his office is 9:20. A short time later when he drops his phone, the time on the phone is reading as 1:44pm.
Also, when we see Griffin's phone lying on the floor, the call duration is frozen at 0.36 - as Griffin never disconnected the call from Pope, the call duration should be continuing to count up.
Note - even if Griffin had stopped/disconnected the call (which he didn't), the actual call duration should be around 0:51 seconds.
This could be irrelevant anyway as Pope was showing as a 'Blocked Caller' (as shown on Griffin's phone), Therefore it is likely that the call would never have gone through in the first place.... more than likely, the call should have shown as 'Unknown Caller/ID' - and not as 'Blocked'.
When Ben (Kevin Hart) is on the beach and following A.J's instruction, you can see him taking a can from the pyramid of cans on the booth counter, and in the next shot the can is spotted on the top of the pyramid again.
When James & Ben arrive in Miami and Ben says he needs to stop to change, you can see the film crew in the reflection of the car when Ben gets out while they're getting the shot of Ben from his feet going up.
In the car chase, when the blue Jaguar overtakes a silver Lexus, the grille of the Lexus including the Lexus badge moves back and forth. Also the louvers of the grille don't match up perfectly.
While talking in the car about A.J. having heard the murder over the phone, both Maya and James claim that is inadmissible as hearsay but hearsay doesn't mean something a person heard directly but rather from a third party such as if Pope had told him about the murder. Anything a person hears for themselves is admissible.