Hm, that's a tough one. I'd have to say the part in Clannad (or Clannad After Story. Can't remember) where Tomoya tells Nagisa that Sunohara is in love with Tomoya, and Nagisa gets all flustered and panics everytime Sunohara tries talking to her. xDD
Second funniest would probably be the whole, "AND A TOILET SEAT!" conversation that Sunohara had with Tomoya. I crack up everytime I see it. XD
Any of it. It's funny and the ending was epic. The Tengen Toppa people would have applauded the awesomeness of someone who suddenly learns how to...
Spoiler :
Catch bullets with his bare teeth and hands when his woman is in danger... Don't remember Kamina or Simon ever able to do that ^_^
oh yeah
"Strength lies in action. Let the weak react to me..." - Kamahl, Pit Fighter from Magic: the Gathering
"That is a mistake many of my enemies make. They think before they act. I act before I think!" - Vortigern from Merlin ('98)
"I AM REBORN!" - Dark Schneider Bastard!! OAV