New set:
1) Correct me if I'm wrong, but weren't there already mammals around at the time, in the form of small rodent-like creatures?
2) Don't tell me you HONESTLY believed that I thought a T rex could fly a jet fighter? They'd be WAAAY too heavy, and their claws wouldn't reach the controls in a thousand years! This is assuming they have the knowledge and the eyesight to fly it.
3) Brains? Who needs brains when you have a giant mouth?