- " Anything in the trap?"
- ―Robot #1
- "Nothing. Today's active humans prefer a low calorie bait."
- ―Bender[source]
Human-Traps are an invention by the robots of Chapek 9 to catch humans. They look very much like a mouse trap and are probably used to kill humans. The robots use butter to lure the humans to it, even though humans rarely visit the planet. Bender says that butter is a bad bait and something low in fat would be better.