Tumbling E. coli (VIDEO) Cell Press This video is under embargo. Please login to access this video. Caption When bacteria tumbles near the surface, one of its flagella jiggles out of place. The bacteria tumbles, decelerating and re-orientating itself to leave the surface. Credit Laurence Lemelle Usage Restrictions Credit Required. License Licensed 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.