Continuity mistake: When Casper gets on the plane, he starts shooting at Marcus from the airplane door. To the left of the door, there are two windows with tin foil taped over; the airplane is obviously in storage. The taping disappears when he fires again a couple of shots later. (01:46:30)
Continuity mistake: When Theresa gets to Mike's apartment and confronts both real and fake Marcus, she mentions that lying to her is no use because she saw them on the news. Will Smith says, "That sh*t be having a slant," both hands free. In the next shot, he's holding a gun in his right hand. (01:32:10)
Continuity mistake: Inside Mike's apartment, Marcus is fighting with the answering machine. Julia puts the bag with one of her dogs down on the couch. You can see her set the bag next to the gap between two pillows, but in the next shot, it's next to the armrest. Also, the strap is off the couch the next time the bag is in frame once he mentions the "peak hours," but nobody touched it. (00:43:10)
Continuity mistake: When the captain greets the Bad Boys, saying "Welcome to our nightmare," Joe Pantoliano is wearing no glasses, either on his face or around his neck. Cut to him opening the door to the vault; he's now wearing a retainer with glasses. The shots are not technically consecutive, but he was only leading them through a corridor. There's no reason why he'd feel the urge to wear his glasses all of a sudden when he didn't even have them on hand. (00:12:25)
