never done the dangerous.
my friend though has: 1. was a the movies with his friend, got bored, left to an empty theater and wanked it all over the seats.
2. in middle school, in the back of class there was a pile of beanbags, did the deed while the teacher was teaching.
Fuck theres more but i cant remember.
But just for shits and giggles, my other friend use to live in NC and back in 6th grade this black kid in his class got expelled from his school for fucking a chick during class, she was just sitting on his lap at the back desk riding him, ahaaha