I give up. What's the big deal there?

I had to look it up 'cause I didn't get it either.
Seems to be a gamer/internet prank of sending a mislabled link to a friend. Upon opening the link, you will be treated to a clip of his '80's video, instead of whatever you thought. So....here you thought you were getting the cartoon, and it turned into a "RickRoll"

My college-aged son started laughing and I asked why and he told me it was the biggest rick-roll ever. Fortunately he had explained rick-rolling to me before. The only way anyone can top what Cartoon Network did is to have a rick-roll during Obama's Inauguration speech.

Disrupt the Obama Nation?
ROTFL!

Yes, the best stunt ever!

I was gonna forward the video to friends and family ... But I think I'm the only one that knows WHY it's funny. :(

I had no idea what a RickRoll was either until I read an explanation here. Rick has a really good attitude about it.