Keep your eye on the bass player on the far
right side of the video after Andy’s introduction.

That, my friend, will be Larry Graham, the inventor of the “slap-bass” style that influenced a whole generation of bass players and funk musicians. And this very song, that’s right, THIS SONG is the song that started it all.

Lose that bass line and the song falls apart. 
You know I’m right.

I put the same video on this page so you can take a second look.