In American folklore, the Gumberoo is a fearsome critter with hide so tough that bullets bounce off of it.
Description The gumberoo was described by early lumberjacks to be larger than a bear with a tough, shiny, black hideCox, William T. with Latin Classifications by George B. Sudworth (1910). Fearsome Creatures of the Lumberwoods. Washington, D.C.: Judd & Detweiler. that nothing could pierce. The only way to kill it was said to be fire, which caused the creatures to explode. It is said that a man named S. W. Allen once took a picture of a gumberoo but the negative then exploded.
References