Thanks guys! I might have to try the sitting version. Maybe the pig-eating version too, that sounds hilarious.
I already filled one of these things with TNT (the collar'd one standing in the water) and blew it up, it was awesome. I put a bunch of sand in with the TNT, so when he 'sploded there was sand shrapnel flying everywhere. I'll probably do it again and film it; it was that good.