Awesome / Off the Air

• The Western Spaghetti segment in the Food episode certainly qualifies. It's amazing what people can do with stop motion animation.
• The music video for the song The Music Scene featured in the episode Animals falls under this as well as Awesome Music. It's Deranged Animation at its finest.
• From "Robots": Boss Wave (aka Mega Man in real life).
• "Dan Deacon USA": The entire episode! It's a 22-minute music video of an entire album which combines the themes of all the episodes that aired before it. Watch it on Adult Swim's official YouTube channel.