I loved that one episode in "Black and White", where Ash, Iris and Stephen(I think) are like: "I'm gonna win that contest!" - "Me too!" - "Me three!", and Cilan makes them face reality by saying: "Well... We can't all win. But we can have fun!"
I don't know why, I just thought that was hilarious.
And then there's the episode where Ash is on the computer all night stalking Gary.