Just about everyone who's spent any time on the set of Foiled has had a go on the clapperboard.  It comes in handy in two ways when I'm editing; first to give me a visual and auditory reference of the scene being shot, and secondly to provide a sync between the sound and picture (not really very relevant as I'm editing on video and they're linked anyway, but it could be handy if I start moving soundtracks around).

Here are just a few of the "claps":

The Mysterious Hooded Clapperman

The Holy Clapperman

Shaun Gostelow