Continuity mistake: Near the end of the movie where Jake is chasing Alonzo, you see Alonzo jump from the roof to the railing on the other side. Jake jumps from the roof too and you see him dangling on the railing as he drops his gun on the floor. A couple shots later you see Jake drop his gun again as he tries to get up.
Suggested correction: You can see Jake pick his gun back up before he drops it again.
Revealing mistake: The streets and the sidewalks are always wet, despite the fact that it's sunny the whole time.
Suggested correction: Sometimes there are many minutes, or even an hour, in between scenes that would have passed in universe. More than enough time for a quick rainstorm to roll through off camera.