Some of the stairs areas at a lot of places are pretty dangerous. Have any of you ever been to Philips Arena? While the sightlines from each seat are great because the seat below you is very low, if someone doesn't want to stand up to let you walk by it is very easy to just fall into the row below you...
I've also seen people on some other boards blame alcohol...but the guy wasn't drunk...he dropped his first beers of the night when he fell...