"What's the best opening track ever?"

A possibly interesting question for people who listen to music in album form. But the answers are too skewed by the assumption that the best albums must have the best opening songs. And I'd disqualify every track that put first because it's thought to be the best song on the album, the intended hit single or whatever. Tell me about an opening track that draws us in... in some special way. Like "Here Comes the Sun," if you play "Abbey Road" the way I always did, Side 2 first.