I have to go with static too. What you are seeing, if this is indeed what's happening, is a record of little lightning bursts across the surface of your film. Dry conditions (winter weather, heated dry rooms, etc) are the prime causes. You know how you get a spark off the end of your finger when you touch the refrigerator door after shuffling across the carpet? Same idea. You can see the spark clearly in a dark room; so can the film.(posted 8963 days ago)