There was one on last weekend where a really fat Japanese woman wiped out on the log roll challenge (the one where you have to jump across about five giant rolling logs...you know the one). Anyway, she went face-first into the one in front of her, then rocketed back and hit the back of her head on the one behind her. Funny stuff!
I hope they do a "best of" edition or release some of it onto DVD, especially if they include some of the more bone-grinding wipeouts.