After Mickey gets over the prison wall, he tries to run away, but is pulled back by the weight of the ball and the chain breaks, yet Mickey still carries the ball when he could just run away and leave the ball.
This is a rather odd Mickey Mouse cartoon, where he is part of a chain gang who likes to sing and dance. Old goodie-two-shoes Mickey ends up in prison, which is something very unconventional for the beloved mouse.
Definitely a different Mickey cartoon - a little suspenseful but minus the laughs.