Peter Doherty, Death On The Stairs, Rhythm Factory, 26.02.08

Actually one of the strangest things about filming like this is having to detach - you might be watching one of your favourite artists, but you have to concentrate on what your camera's doing and make sure it's following what's happening onstage, and you really can't start forgetting what you're doing and singing along when the rest of the crowd does. Or sort of jigging around a bit - dancing would really be stretching a descriptive point - or turning round and forgetting that you're filming if someone starts trying to have a conversation with your back.

So you try to avoid standing near any of your friends who might get a bit chatty or start dancing into you enthusiastically. Or bellowing. It's really quite a disciplined art, if you can call it that.