Calvin and Hobbes by Bill Watterson for August 18, 1992

They’re really tricky, those fiends.

mom and reason are like oil and water:)

There’s a portal under the bed that they hide under until the lights go off and the parents aren’t around

I’m surprised at Calvin’s response in the third panel. He’s perfectly capable of communicating with the monsters while he’s in bed. Also, since he sometimes fantasizes about shrinking to insect size, and he once had a fantasy about outgrowing the planet, I’m surprised he didn’t say something like, “Monsters are very mysterious. These particular ones must have had the power to shrink to microscopic size when you checked for them, and then grow back to full size after you left”.