As Warhol got more and more excited by my pictures, I did something that's a no no - I took out my Nikon and started shooting hand-held time exposures. Wharhol didn't like it one bit, and complained. I said, 'I can't help it, Andy. God construted me this way, to take pictures.' I was really flattered that he collected my prints – until I found out later that he collected 'everything'.