I once tiled a bathroom in a flat above a shop. Very cramped leg-wise, as I'm 6ft4, and tiling the lower part of the wall, whilst sitting on the floor, with a section of removed floorboards. As I was getting up, my numb legs flopped down a bit, touching the platerboard beneath. It brought down a section of ceiling in the shop below.Dude as a tile setter here in Cali they sometimes do what is a called a hot mop showerpan... I knew a hot mopper who accidentally stepped back and his whole foot and leg when into that bucket...capital F U C K! He was screwed up for a half a year healing up and was never quite the same...damn!