My favorite part (a hard choice, even in only 2 minutes, 19 seconds)? When the nerds try to high five and can't. So been there.
Elder Brother, you and I should memorize this and perform it at every family gathering until one of us dies, and then the other would continue to perform it alone as tribute.
Yes, I find it that funny.
I also find it nostalgic, so, if you'll excuse me, I'm going to go play with my 2d20 and roll a few for old times' sake.