Steampunk toon: A Gentleman's Duel

In the 8-minute animated short "A Gentleman's Duel," what starts off as a sexist little cartoon about a Frenchman and a Brit vying for the attention and affection of an improbable-breasted bimbo builds up a rapid head of steam as the antagonists climb into their giant Victorian mecha suits and kick the snot out of each other, with a lot of Road Runner-esque funny gracenotes.

Link

(Thanks, Andrew!)