Bicycle Repair Man is a sketch from the third episode of Monty Python's Flying Circus, "How to Recognise Different Types of Trees From Quite a Long Way Away."
A narrator (John Cleese) follows F.G. Superman, who lives in a city full of other Supermen, but he holds a secret identity of superhero Bicycle Repair Man. When he learns that a bicycle needs repair, he distracts the other Supermen so that he can change his clothes into Bicycle Repair Man and goes to tend to the bicycle. The bike's owner asks to repay him, but Bicycle Repair Man says there is no need and it is all in a day's work for him.
The narrator then goes on a tirade against communists.