This was popular in my high school for awhile. I remember kids doing it even while under teacher supervision! I also remember really bitching out my boyfriend for doing it because I thought it was dangerous. He got a hard time about that, but really, it's just a stupid and dangerous idea.

I'm now feeling slightly embarrassed about people who see this thread and think I want to talk about a fetish or something :o

Nah, you're fine. The two really aren't the same :p