Giant Gila Monster

Don't try to run. It knows you are there, it can taste your fear with its tongue. Or at least your mild shock as you think, "Is that a really big gila monster?" Say goodbye to your vehicle, because nothing enrages the gila monster more than hot rods driven by cocky young teenagers.

So maybe its not a classic monster, but I felt it deserved to be honored with a poorly rendered sketch, at least.