BHWW - 2009-08-07 STEVE TYLER'S FALLEN AND HE CAN'T GET UP!
Scrotum H. Vainglorious - 2009-08-08 I'm sure he did this a lot in his younger days as well.
Stopheles - 2010-02-04 From what I've read, it was pretty much guaranteed to happen at an Aerosmith concert in the mid-70s.
StanleyPain - 2009-08-08 Something close to this happened when I went to see Alan Parsons Project one time. Kansas was the opening band for some reason and the lead singer tried to leap over the keyboard and instead he just kind of tumbled over it and onto the stage with a violent thump. He seemed alright, I guess, and went on to do a heartfelt rendition of Dust In The Wind.