Revealing mistake: In the foot chase between Ben and AJ, they go past some clotheslines, then run down an alley. The shadows in the reverse angle don't match the footage from the front. Also, in one shot Ken Jeong is doing a bit of a swerve towards the right of the screen that is not consistent with the view from behind (looks like he is dodging the camera filming him: his character needs to go in that direction anyway, but only a couple of shots later). (00:28:55)
Revealing mistake: During the foot chase, the small part that follows the one when they run through the BBQ party and James looks at them from his car, just before the trampoline bit, features the image in reverse. Look at the writing on AJ's pack, or how now Kevin Hart is wearing his watch on the right wrist, with the gun holstered on the left. (00:29:25)
Continuity mistake: In the foot chase, Ben falls on his butt frightened by a big dog on a leash, is up on his feet in the background when AJ topples the table by the pool, has yet to get up in the shot that follows. (00:30:20)
Continuity mistake: The brothers in law have just captured AJ after the foot chase. AJ is trying to make Jason mad. Ken Jeong's hair is not consistent between shots; look for instance when he leans in saying "The sex part. Think about it." He had messy hair across his forehead a moment before, now it's all gone. (00:33:00)
Continuity mistake: When AJ irritates James chirping "Me so horny" in his ear, the car comes to a full stop and AJ bumps his head. At least in theory, since it appears it's more a camerawork effect than the car actually coming to a screeching halt. In the close-up within the car, Ice Cube is also holding the wheel firmly with both hands up, in the 10 and 2 position. But in the wider angles the person in the driver seat is holding the wheel more casually than that. (00:33:55)
Continuity mistake: When in the club AJ introduces the lady friends who are totally not prostitutes, Ben has both hands on the Assface phone in the wider shot but just one hand on it in the closer angle that leaves his head out of frame. (00:36:35)
Continuity mistake: Ben is taking a picture of AJ between two strippers and their gazongas. AJ, facing some stereophonic chest compression, says "I can't breath no more"; next to Ben's phone you can see the non-prostitute holds her drink with the right hand. In the last shot that girl is holding it in the left hand. (00:36:50)
Continuity mistake: AJ calls for the toast for Ben; the escort sitting next to Kevin Hart claps her hands along with the others for "Toast! Toast!", but in the following shot her hand that was up in the air to clap before the cut is suddenly back on his shoulder. (00:37:20)
Character mistake: Ben counts the bullet the hitman is shooting in the club. His count reaches "13,14..." but the killer shot already 15 shots by the point his count begins, and he suddenly squeals "He's out" when he hasn't shot a fifteenth by his own count. It's funny that he does that anyway though, since the FN Five-seven the villain uses has a magazine capacity of 10, 20 (the standard) or 30 rounds. He wouldn't be out of bullets at that point. (00:38:20)
Continuity mistake: Waiting outside the club after AJ's escape, James and Ben are talking and Ben is trying to say that he totally did not want to have a good time with hot women around. In Ice Cube's reaction shot Kevin Hart brings his hand forward, but he still has his arm stretched out in the next shot. A moment later Olivia Munn arrives, and there's another slight continuity jump; she dismounts from the pick-up and Kevin Hart looks away from her turning towards Ice Cube, but in the closer angle that follows, he's staring at her, hand raised. (00:39:50)
Factual error: As it happens in many Hollywood movies, we have a gun that is "ceramic" (actually a polymer, "plastic" as Ben corrects himself later) that is entirely stealthy, able to fool the metal detectors at the entrance of a building. It's not an imaginary high-tech device, but is explicitly referenced as the FN Five-seveN handgun (here called repeatedly as FN Five point seven). The metal detector would still pick up the metallic parts and the bullets. (00:40:25)
Continuity mistake: When Kevin Hart and Ice Cube meet Olivia Munn after the car explosion after the bachelor party club scene, Olivia Munn's hands change position between shots to either by her side, hands on hips, or arms crossed, with no time between to change position. (00:40:30)
Continuity mistake: When Ben picks his jacket up and walks past Maya and James to go towards his car, Olivia Munn goes from having her arms down her sides to a pose with her hand on her hips, instantaneously. (00:41:30)
Continuity mistake: In the car bomb stunt, Kevin Hart slides off the hood twice in two separate shots and gets up leaning against the police car with his left hand in two different spots, curled also differently. (00:42:10)
Continuity mistake: The brothers in law bicker in front of the massage parlor. There's a specific shot when Kevin Hart takes about 3 seconds to talk about Cory being "the devil's spawn with lady parts." When the camera is back solely on Ice Cube, the same big dude with a black tanktop who was walking behind him is still walking, but starting from the same exact spot as earlier. He made no progress at all while he was off-camera. (00:45:50)
Continuity mistake: At "Beach Kitten Inc.", the receptionist offers a bottle of water. Behind her, a girl wearing a orange bikini is the same girl that is walking behind Ice Cube in the reverse shot a moment later. (00:46:30)
Continuity mistake: James' approach to Tasha from the swimsuit models joint is failing right from the start, and his 'brother' takes over. He puts a hand on his shoulder, it's visible in the next shot that he lowers his arm, but he's still in the same position as before with the hand on his shoulder at the next cut. (00:47:00)
Continuity mistake: When the default Apple ringtone plays, there are continuity errors with Tasha's hands. She has her left hand on her mouth (you can tell even if she's in the foreground) when he points out what the sound is, all of a sudden. And seconds later when he says "That costs absolutely nothing!" her raised arm switches from right to left. (00:48:00)
Audio problem: At the end of the scene with Tasha, Kevin Hart's voice says "I'm just asking" when he has his back turned to the camera. His mouth does not move when the phrase is heard, only before. (00:48:20)
Continuity mistake: At the beach booth, AJ makes Ben pick up a can of Fanta Grape from a pile of 6 (3 on bottom 1 on top). Ben picks up the one on top and puts it back on the counter by the rest of the pile. The can disappears in the wider angle and is back on top of the pyramid right at the cut. (00:51:40)
