Chop Screwy was a robot that appeared in a TV trailer for Robot Rumble. It had two axes either side for weapons and was seen chopping the legs off its opponent, a green four-legged walking robot. Homer was inspired to build a robot with Bart after watching the trailer. Homer ended up trying to build a robot himself after Bart reminded him of his lack of Technical Knowledge, and eventually donned a robot suit himself after his attempt to actually build a robot failed.