Most entertaining/dangerous has got to be the guys who do their snowmobile seats during a fall detail. Come winter, when it gets cold, they wrap their a$$ in nylon and hit the trail...hit it pretty hard actually in the first corner.
As for cars, I can deal with the overzealous detailers with the armour all. I can usually get that off. It's the hacks who shoot the entire underhood with clear lacquer that get their special spot in hell....
