It resembles nothing more than a plain old human skeleton.
Scooby-Doo, Where Are You!
When Shaggy Rogers, Velma Dinkley, and Scooby-Doo discovered a "crashed" plane, they found fake vines made of plastic. When Shaggy removed the fake bush, he witnessed a "living", laughing skeleton, which nearly made him faint. Upon inspection, though, it appeared to be operated by a wire that Shaggy tripped. Before they left, Shaggy decided to get the "last laugh" by making a joke. However, the skeleton started laughing again as if it were real. The gang then ran from hearing its sinister laugh.
- This is another instance of how a rigged skeleton (or in some cases just a skull) may be, in fact, real.