Lily: It's some sort of mutant combination of the two. It's as if a cockroach and a mouse, you know...
Barney: Did the horizontal ten-legged interspecies cha-cha?
Robin: That's impossible. That simply can't happen.
Lily: Oh, but it can.
Marshall: And it has.
Lily: And it's pissed.
[Lily and Marshall down shots]