I always use the legs in the air position when someone goes out at school or when I'm reffing at NAGA. In addition to whatever it does with the bloodflow, it allows me to keep the occasional spaz-out in check. Maybe it's because I always ref the behemoths, but probably 60% of them think they're still in the fight (and I'm the opponent) when they wake up.
I had one pants-shitting incident. It was not pleasant, but at least he was wearing a black gi.