Bad Boys (1995)

Continuity mistake: When the two female characters enter the fancy hotel room, they make a point to say they will only be there for a couple of minutes. It is daylight when they go in. The visit is cut short (the one that's supposed to be a few minutes long) because of a gun battle in which one of the women dies and the other escapes. The escaped one gets out through the roof into an evening's sky. There's still light visible, but for a visit that lasts all of 4 minutes, it's far too quick a change. (00:23:00)

Plot hole: Why was $100,000,000 worth of heroin sitting in the police vault all this time before the bad guys stole it? Wouldn't the DEA have taken possession of the drugs long before that?

Continuity mistake: When Marcus meets Julie Mott she attacks him with a bat. He takes the bat off her and moves to leave. The next shot of Julie Mott sitting on the floor shows the bat in the foreground. Cut back to Marcus still holding the bat and he asks her, "Look lady, you ain't got no more bats, do you?" (00:35:00)

Trivia: Pretty much all of the dialog between Martin Lawrence and Will Smith was ad-libbed. The original script can be found here: http://www.imsdb.com/scripts/Bad-Boys.html, as Don Simpson and Jerry Buckheimer thought it would be better and more funny.

tattoojunkie

Marcus Burnett: Oh, man, that was cold.
Detective Sanchez: Yeah, so was your mama's bed.

Mike Lowrey: You know you drive almost slow enough to drive Miss Daisy.

Marcus Burnett: You see what happens when you go off without me? You get into shit.
Mike Lowrey: Oh please, like shit don't happen when you're there.
Marcus Burnett: That - that ain't the point.