Season 31, Episode 10: "Bobby, It's Cold Outside"
Homer tries to inflate an inflatable Santa and it winds up over inflating and flying away. He looks at it and says "I wish that was me," then shoves the hose in his mouth. He starts to swell, but before he floats, Marge stops him.
Here ya go. 4:28.
Grab it while it's hot because I'm betting copyright-chan is gonna take down the video in a record time.
My username is stupid.
Better known as Poqato on the art scene.