"Come on, those dinosaurs don't chase themselves"

Leek: Shall I... speak to the contractors?
Lester: Oh, there's no need. I'll just get a shovel and a cement-mixer and do it myself. Of course you should call the contractors, you idiot!

The mammoth on M25:
Leek: Actually sir, the Columbian is a hairless species-
Lester: I don't care if it's shaved its legs and gotten a bikini wax: it's on a motorway in broad daylight!