When I saw it the first time, I wasn't very impressed. It seems much more impressive with a little maturity on its shoulders. I'll write about it later. For now, here's a bit that takes my breath away.
Dazed and Confused's famous guitar performance commences with Jimmy Page bowing the strings, wringing a sepulchural chorus of protest from the guitar. As that reaches its end, for a touch of theatricality (which is surprisingly effective musically) he slaps the bow down hard on the strings, a cobra-fast strike that produces a squeal of protest. There is an echo effect, so the yelp comes back a split second later. For that second sound, Jimmy brandishes the bow in the air. The additive effect of his many strikes/salutes during the solo makes for a spellbinding piece of cinema.
The hair of the bow is shredded by the end of it; I'm surprised he didn't break the stick over the guitar at some point. You have to see it in motion and hear the soundtrack to appreciate it, so I can't show it here.
Instead here's a short sequence from the beginning. At the first strike, a puff of rosin jumps into the air as the bow is lifted.
Click on the thumbnail for a larger picture.
The camera really was in the right place at the right time to get the optical effects centered the way they are over the guitarist.