2 hours was enough for me. What I saw I enjoyed though, it wasn't Beijing-awesome but it was still really cool. They did this really neat effect where they projected an image of whales swimming by on the stadium floor and breaking the "surface", and then shot up bursts of water or air or something right where the blowholes would be. I thought that was quite fancy. There were also some girls in fishnets who tapdanced and played fiddles which was appreciated. Sucks about that guy who died ...