Calvin makes a springboard. He says Mom won't get him one. He's going to do the highest jump into a leaf pile Hobbes has ever seen. He puts a board on a log, then puts a rock on one end of the board. Calvin runs up and jumps on the other end of the board. The rock flies up, hits Calvin in the head, and Calvin falls down. Hobbes asks why Mom wouldn't get a springboard. Calvin says she was afraid he'd hurt himself.