Cerberus was a vicious beast that guarded the entrance to Hades and kept the living from entering the world of the dead. According to Apollodorus, Cerberus was a strange mixture of creatures: he had three heads of wild dogs, a dragon or serpent for a tail, and heads of snakes all over his back. Hesiod, though, says that Cerberus had fifty heads and devoured raw flesh.

. . . A monster not to be overcome and that may not be described, Cerberus who eats raw flesh, the brazen-voiced hound of Hades, fifty-headed, relentless and strong.
Hesiod, Theogony 310

http://www.perseus.tufts.edu/Herakles/cerb...

Almost as scary as having Dan Quayle on your board.