Embarrassing punishments

Not the reason you were punished for but THE punishment which was soo stupid and embarrassing that you swore to never try or do the thing ever again!
I'll go first,
My friend had to hump the ground in front of the whole class because the teacher caught him humping the ground as a joke in the bathroom,skipping class with his friends and it was HILARIOUS!
He promised to never skip class again lol!
Anyone else?