Video S3 from Terrain following and applications: <i>Caenorhabditis elegans</i> swims along the floor using bump and undulate strategy Jinzhou Yuan Hungtang Ko David M. Raizen Haim H. Bau 10.6084/m9.figshare.4239767 https://rs.figshare.com/articles/media/Video_S3_Nematode_Interaction_with_Bottom_Surface_Rear_View_from_Terrain_following_and_applications_i_Caenorhabditis_elegans_i_swims_along_the_floor_using_bump_and_undulate_strategy/4239767 Nematode Interaction with Bottom Surface (Rear View) 2016-11-29 13:14:10 Caenorhabditis elegans swimming thrust ratchet sorter terrain