A careful inspection showed them that even if they succeeded in righting it by themselves the cart would travel no longer. The axles were in a hopeless state and the missing wheel was shattered into pieces.
The way to work with a bully is to take the ball and go home. First time every time. When there's no ball there's no game. Bullies hate that. So they'll either behave so they can play with you or they'll go bully someone else.