Check this out https://images.saymedia-content.com/.image/t_share/MTc0MjgyMDExODY1Nzg1ODUy/photographing-motion-trails-of-light.jpg https://images.saymedia-cont

Check this out https://images.saymedia-content.com/.image/t_share/MTc0MjgyMDExODY1Nzg1ODUy/photographing-motion-trails-of-light.jpg https://images.saymedia-content.com/.image/t_share/MTc0MjgyM... I assume one flash at the start and one at the end of movement