How about something really recognizable and horribly un intimidating. Something the crowd is forced to remember or maybe even sing unwittingly as you walk out.
The Full House theme song?
It'll get stuck in their head and they'll be singing it all long. It'll be hilarious.
"The lockdown is not the 10th Planet gospel; an open mind is the 10th Planet gospel."
- Amir Allam
haha even try going for the discomforting/unintimidating song, like "Doin' it" by LL cool J
"Blame the IBJJF when, in 30 years you see an academy that nails the phrase, "A Red belt is a Junior black belt that hasn't died yet" on the far wall."