The Invisible

Corrected entry: When Nick is trying to use the pigeons to alert Detective Tunney that Pete is about to leave on a bicycle, in one clear shot up the street, Pete and the bicycle are missing.

Correction: This is actually not a mistake. They just showed it from a different, tighter camera angle. If you look closely at the section that his bike is chained to, Pete is at the section of railing that is out of that particular shot, not the double high section that they're showing.