Rapture wants to play a game with her trample slave. She's going to stand as heavy as she can on him, using one foot so all her weight is concentrated, and see how many times she can make him tap for mercy. She works over his stomach and face, crushing him under her 190 pounds of muscle. All that weight makes it impossible for him to breathe, and Rapture's slave finds himself tapping so he can catch a breath of air.