Music Banter - Most disappointing live act you've ever seen?

Some gigs are so memorable because of the sheer awesomeness of the performance, many are enjoyable, yet forgettable, and some few are simply too terrible to forget.

I remember seeing The Zutons supporting R.E.M. in Cardiff years ago, and I will never forget how mind-numbingly dull their performance was. I was never a huge fan of anything I'd heard by The Zutons, but I expected to at least see some dynamic, fun-loving activity on stage. But the songs droned lazily from one into another, with no enthusiasm, no interaction with the crowd, no passion, and an on-stage manner so limp that some of the audience members LITERALLY died.

The most frustrating element to their set was that one couldn't "boo" or bottle them off because they weren't really doing anything wrong, they were simply the musical equivalent of a continental breakfast; passable, yet disturbingly unsatisfying

...R.E.M were good though.

I'm curious to hear your awful gig experiences?