In no particular order:
EVA:
The fight between Asuka and Shinji after they fought Israfel (the angel that could split into two). Comedy gold there.
Ah! My Goddess (not the OVA):
Pretty much everything that happened in episode 4.
Hand Maid May:
The scene between Kazuya and his decendent from the future, Commadner Z.
Kazuya: You're my decendent, which makes me your ancestor! Show some respect!
Commander Z: (kneels down to pray) Rest in peace, departed soul...
Kazuya: AHHHHH!!!!! Don't pray to me! That's bad luck!
Azumanga:
Osaka with the knife. Need I say more?
Goldenboy:
In the first episode when the Presedent woman spat at Kintaro. You have to see. I can't describe it.