Side-by-side comparison (VIDEO) University of Colorado at Boulder This video is under embargo. Please login to access this video. Caption On the left, nothing is visible to the naked eye. On the right, a powerful green laser helps visualize the aerosol plumes from a toilet while it’s being flushed. Credit John Crimaldi Usage Restrictions Credit must be given. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.