Time lapse is when a movie is created spanning months or years by taking one photo every hour/day/week... I saw this one cool youtube video where a guy made a time lapse video of himself over like 15 years or soemthing! But yeah with lasers he probably ment time elapsed before the shutter closed after openin. Like you said, 'long exposure' 'low shutter speed' etc.. but time lapse sounds cooler.... enter the time tunnel lol ~-~-~