Chisel is the greediest Decepticon in Megatron's army. If you have one of something, he'll want a hundred more. While this attitude often puts him at odds with other Decepticons, especially those in his Dread squad, he will defend what is his with a psychopathic vigor that makes him a nominal choice for resource transportation. Chisel would rather extinguish his own spark than lose even one small piece of his "collection." The elusive Superfund truck from Dark of the Moon may have just been a human vehicle flying the 'con colors, but that won't stop me from guessing at what may have been.