Mine was the one where Stewie beat up one of Lois' piano students, and treats him as a domestic abuse victim.
[Punching]
Lois: Okay, I got more music sheets. Oh my god! What happened? Stewie: Yes, what happened? Kid [looks at Stewie]: I fell.
Classic.
-D
"In the end, there can be only one, and it may as well be me!"-Kenny (from Highlander: The Series)