Yeah,,I was riding a thrift shop bike home,and the seat turned sideways,the post was loose in the tube.it was not a safety issue.I was close to home.But when I slapped a mtn schwinn sidewinder together after years of neglect,I wasn;t used to twist grip shifters and hammered it going up a hill and shifted myself out of this world almost I survived with a nasty pulled muscle.I balanced all my weight on one arm ,didn't go over but would a been better to tuck and roll rather then the one handed hand-stand OUCH!