How do you crash a prom?

Answer 1

If you mean to ruin a prom:

Go in with a Trumpet (or any loud instrument) and start playing loudly and annoyingly. Bump into people. Wear hideous 80's clothes. XD A riot. :)

If you mean to go in without an invite:

Don't talk to anyone, simply by avoiding them. If you arecaught in with a conversation (worst case scenario. Take a buddy, perhaps.), play along using a fake but totally common name. Like James Smith or Mary Smith. Your cousin invited you along but went home sick. You're from (insert state nearby) and visiting. Your cousin's name is May Smith, but May "isn't known well around school, she told me."

GOOD LUCK, YA LITTLE AWESOME RUDE DUDE! :D