played a gig in a squated house where there was a concrete drum raiser with a hole the size of a fist or so in the middle of it. the headline drummer placed the drum kit right next to the hole. while playing the drums were creeping forward and turning away everytime i would hit the kick and at some point the pedal fell in the hole as the kick turned away and dislodged from the clamp. luckily it was near the end of the song so no harm done. but i finally had enough of it and put part of a rail track they had there infront to keep the kick in place