Continuity mistake: In the beginning Martin Lawrence puts a chrome snub nose .38 to Tim Robbins' head to rob him, then throughout the rest of the movie the same .38 Special gun is miraculously black. You can see this when Tim Robbins accidentally robs the gas station clerk who pulled a chrome shotgun because he thought he was there to rob the store.
Continuity mistake: When Nick gets back to the hotel room the robbers have left T. sitting on a chair, precariously balanced on the railing of the balcony, held back only by a bedsheet whose other end is stuck between the balcony doors. Only a small tip of the bedsheet sticks out right next to the spherical doorknob, but a few shots later there is a close-up where a larger tip sticks out and the doorknob is flat. (01:15:20 - 01:16:25)
Continuity mistake: When Nick and T. chase the two robbers to get their money back there are two tidy wads of notes stuck under the right sun visor. At a wider camera angle the money isn't there, but when it cuts back there are even three wads, and the middle one is rather crumpled. (01:17:45)