Calvin and Hobbes look at a rock. It's moving. Hobbes says there's something under it. Calvin says it must be a Martian. He says it's probably some creepy, tentacled, bug-eyed monster. They see a tentacle come from under the rock. Calvin says it's coming out. He wonders what they'll do. When they see the Martian, and the Martian sees them, everyone jumps into the air and shrieks.