The Goodies1970

Graeme Garden:
[as they enter the Tyrannosaur's stomach and look at the dried bones littered about] Fascinating! It's lain here undisturbed since the Cretaceous Era! Look at this - the remains of its last meal!

Bill:
[Starts rooting through the bones] Oh yes, very tasty, too. Look at this. A couple pterodactyls, for starters. A sabertooth tiger, one buffalo off-the-bone, and one cheese and chutney sandwich... [Suddenly stops] Wait a minute. I thought you said this had lain here since the Cretaceous Era.

Graeme Garden:
I did.

Bill:
Well, there weren't any Sabertooth Tigers then, you fool! The subfamily of Sabertooth Tigers originated in the Oligocene period!