I attended both gigs in Frankfurt Festhalle as they where on the same day.
had a ticket for the 17:30 show but not for the 2nd one. so after the 1st show, I just didn't leave the Fairgrounds and hid underneath a truck.
security was slack, just some lazy local Hells Angels lounging on their bikes and sipping beers.
no one noticed when I joined the new crowd that was moving in.
at the last door I only flashed a used ticket and made a run upstairs; landed on the right side balcony from where I could look behind the curtains of the stage.
I could clearly see a big square mirror with many long white lines on it.

while Mick is workin' the crowd out front on the left stage side - Keith comes backstage behind the curtain...and helps himself.
vice versa - Keith rocks out in the front while Mick comes running around the back.

I was on the 2nd balcony, so mid-set I was climbing down (on the outside) to the first balcony, which was a lot nearer to the band.
you can see those balconys in the clip.
memory is a bit blurred so the setlist helps
http://rocksoff.org/1973c.htm but I do know I was in awe and frikkin' exhausted after all that - oh, and that smell inside the Festhalle. you got stoned by just breathing
