Kim shows her friend Lisa, how the photografer can be punished.
They both wear flat boots, he says "go for it" they cannot hurt.
First Lisa stands on his hand, while Kim steps on him, then she wants also step on him, using his face as the stair, the face isn't stable enough, so she slips and fallls down, lucky that there is a sofa.
Later they find a safe balance on him and the trampling increases, running in place, some small jumps.... maybe it hurts a little bit????