The Disembodied Hand That Strangled People was a story that Calvin's father came up with when Calvin wanted a scarier-than-usual bedtime story. The story was never actually heard but involved a sentient, disembodied hand that strangled people to death and was never found after it had completed the murders.
This marks the first appearance of Hamster Huey and the Gooey Kablooie, although Calvin turned down the story instead of obsessing over it.
Dad telling Calvin the story of "The Disembodied Hand that Strangled People."