Make a syringe that when injected, the player grows more limbs and all of the new and old limbs start growing and shrinking at different speeds. The syringe would stop after 10 - 30 seconds of waiting. The syringe could be named "The Wacky Syringe" as t makes the human look really weird and wacky. I know it's a lot, but I think it's a pretty fun idea.