I just remembered this song today and how amazing it is. I think it's safe to say that it's my all time favourite Led Zeppelin song.
The stimulating guitars of Jimmy Page, the raspy voice of Robert Plant, the banging drums of John Bonham and wistful keyboards of John Paul Jones (poor John Paul Jones, he's so neglected). So powerful, so climactic.
Led Zeppelin - Since I've been loving you
I also used to watch this movie all the time when I was 15.