A couple of weeks ago, a friend saw a flash go off while she was on stage. She grabbed the offending customer's phone and hurled it to its death. Serves him right for taking pictures in the club. Except wait: He had his iPhone set on flash alerts, which makes the phone emit bursts of light instead of a alert tones! Oops. To avoid misunderstandings like that, only use your phone wne you're far from stages or naked women.