Who is ben ki moon, in the film before the flood

Read the sentence below: the shoemaker's assistant was given the boot when he was discovered stealing leather. which of the following correctly explains the pun in this sentence and the word or words on which it is built? given the boot—a shoemaker would work on boots shoemaker's assistant—shoes are made mainly by discovered stealing—discovery and stealing both are secretive stealing leather—leather and steel are both used to make shoes