Fitting chain upside down i.e. kmc, khe. f**ks me off that does... Fitting tyres with tread wrong way.. doesnt change owt just annoys me. Bleeding brake then realised i forgot to undo the tpa. Always forgetting you turn a bb the opposite way to normal to take it out. Slipping whenever undoing anything and always smacking my hand in to frame, floor, spokes, disc, casette... the list goes on. Putting as much force as i have in to undoing a bolt.. then it suddenly goes and i fall over + see above happens. Fixing a puncture, fitting tyre back on and fitting all back to bike.. blowing tyre up and theres another puncture i missed.