What's the connection between Steve Miller Band's Swingtown and Ozzy Osbourne's Crazy Train? Mutual friends from each band used to play together. And when Randy Rhodes from Quiet Riot heard Swingtown he intentionally started playing around by speeding up the tempo of Swingtown and thus Crazy Train was born. There you go.
Someone said it best. If we ever make contact with alien lifeforms we should do it by letting them listen to this song for first transmission.
It's awesomeness is beyond words.