Justice League Unlimited, Season 1

[Chronos sends the traitorous Joker, Chucko, back to prehistoric times]

Chronos:
Enjoy your stay.

[Chronos disappears in his portal; a Tyrannosaurus Rex appears and Chucko draws a lightsaber]

Chucko:
You think I'm scared?! I'll be running this dump in a few ye-! [sees a giant asteroid falling right towards him from the sky] ...Aw, phooey.

[We see a massive explosion on Earth, killing the dinosaurs and Chucko. Chronos returns to Enid and the other Jokerz]

Chronos:
Do you know what killed the dinosaurs?

[The Jokerz look around stupidly]

Bonk:
Uh, no... sir?

Chronos:
Well, Chucko does. And unless you wanna find out firsthand, you'll go finish off the Justice League. Skedaddle! Time is money! [to Enid] Actually, time is the non-spatial continuum in which events occur linearly, usually in the direction of increased entropy. But the clowns seem to relate better to the money thing.