Continuity mistake: When Nick pulls into the diner the back of his truck is clean. When he parks it is covered in dust.
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 the 4x4 is being rammed, there is a shot of a car traveling in the opposite direction. In the very next shot, it is gone.
Continuity mistake: Just after they rob the gas station they do a turn in the road to avoid the cops. If you look you can see skid marks doing the exact same turn in the same place, revealing they are from previous takes.
Continuity mistake: When T is saying to Nick what he would have done in Nick's situation, he has grass in his hair that is constantly moving.
Continuity mistake: When being chased, the 4x4 gets damaged down one side. When leaving from the heist, it is fine.
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)