Song With Best Beginning

Stones: Nineteenth Nervous Breakdown

Good Beatles picks above.

Grateful Dead: Help on the Way, Shakedown Street

"Does Anybody Really Know What Time It Is," another by Chicago.

stones: cant you hear me knocking.

iggy pop: sixteen

Very good replies so far, I'll also add Black Sabbath's NIB for Geezer's awesome bass intro.

Back in '72/'73 there were three albums that came out with a heart beat as the first song/intro.
Tull's "Passion Play"
ELP's "Trilogy"
Floyds, "Dark Side of the Moon"
I quite often wondered how they all came about to be released around the same time with the same intro. I figured the producers were out slamming ales somewhwere in Great Briton and got to talking about music production. I could hear them in the morning, " Ive gah' a brilliant eye-deeya. We'll star' wih' an arhbeyt."
-John