I know there are a lot of different anime threads already, but this one's specifically about favourite scenes.
My favourite scene is the AmiMami-Chan part 2/ Kisaragi movie trailer scene. I love the puns Ricchain, Azuscythe, Ami and Mami make Amami, etc., the references Mecha Chihaya, Harukakka, maybe more?, Futamis with their hair down (anyone else think Ami's hair looks almost exactly like Haruka's that way?), the jokes, and the overall awesomeness of the mechs and plot the cheesiness makes it that much better. The also music goes really well with the scene. The whole thing is just awesome.
So, what's your favourite, and why?