Minomusi

Minomusi (ミノムシ) is a badnik in Sonic the Hedgehog CD's Wacky Workbench. It isn't listed in any instruction manual, but it is referred to as "minomusi" (the Japanese word for bagworm) in the game's source code. It is a badnik that hangs from the ceiling. When Sonic comes near, it lowers, stays lowered for a few seconds while showing and hiding its spikes, and then goes back up. Just hit to destroy.