This part from series 2 made me laugh all last night, and most of today.
Each panelist was given a bunch of alphabet magnets and told to make interesting phrases with them. Jimmy Carr used all his letters to make "PUT SMARTIES TUBES ON CATS LEGS MAKE THEM WALK LIKE A ROBOT", which I thought was fucking fantastic. Alan Davies said something like "That is...That is un-fucking-believable! it makes sense--they would walk like a robot. It's an idea, it's like giving people an idea."
I sometimes just want to pinch Alan's cheeks or poke him on the nose.