I watched some of the Olympic divers warm up the other day. Their pool is right next to the swimming pool that Michael Phelps ruled all week, but the events never run at the same time.
If you look closely at this picture, you can see the diver who has just jumped from the high dive. When these guys are warming up, there's a lot of action -- several divers jumping at once from different boards. The ones that do the handstands on the end of the high board always amaze me.