“Don’t slam the door!” pleads a parent as a boy and his dog head out to run an errand, but the distracted boy doesn't hear. What follows is a fantastical calamity of epic and silly proportions, all thanks to a slammed door that dislodges a red ball. As the ball bounces through the neighborhood, it unleashes an escalating series of slapstick events that involve animals and people thrown off course and into the air, traffic jams and near-collisions, a fire-breathing dragon, tiny alien creatures — and a boy completely oblivious to the chaos he has caused.