#1.) Someone Mysteriously Disappears from a Street Corner When a Big Bus Drives By. Obviously that never happens in real life . . . unless the bus stopped, sat there for 30 seconds, and picked them up.
#2.) Hearing a Dial Tone When Someone Hangs Up on You. In real life, the line just goes silent. But in the movies, they always add a dial tone so the audience knows what's happening.