On last night's A Very Gilly Christmas special (which I happened to like a lot, by the way... the "Gilly" character works better in small doses), they showed the beginning of the Christmas Kangaroo sketch from a few years ago.
They only showed the beginning - I guess the rest of the sketch was too controversial for prime-time. Too bad, because it was an all-time classic.
Luckily, we can all enjoy the full version here.