Calvin and Hobbes by Bill Watterson for August 22, 1988
Calvin: Everything floats randomly in the room! There's no gravity! Calvin pushes off the ceiling at a sharp andle, aiming for the hallway! He glides with unchecked momentum, turning himself to be able to push off the next stationary surface. Mom: C'mon you! Outside! You're really bouncing off the walls today. Calvin: Aw, Mom.