1.
Press the wrong floor button.
2.
Tell someone that the elevator is going down when it is really going up.
4.
Hum, whistle, or sing.
5.
Talk loudly on your phone.
7.
Hit the door close button as someone is trying to get in.
9.
Take up a lot of space.
11.
Break personal space boundaries.
13.
Pretend to be a ghost.
15.
Either rip a loud fart...
16.
... Or drop the silent but deadly bomb.