Note what happens: Neil, who is about to start a new song, stops his band, bends down to the girl and says "Gimme that" in a very stern voice. She doesn't react, so he repeats it, and she timidly complies. Everybody half expects the camera to be tossed backstage or smashed on stage, but Neil turns around and starts taking photos himself. "Nick, can you step over in front of the drum kit?" -- he directs his band mates (which at the time still included Tim) for some souvenir smiles and then actually pulls the girl up on stage and makes her sit on the drum kit (maybe even on Paul's lap, I don't remember). Then he returns the camera to her with a remark to the effect of "now please stop taking photos, these flashes are really irritating".
I saw the girl later as she floated by, occasionally moving her legs so not to scare anyone nearby...
