Water droplet animation and the link to stellar superclusters
This animation from Hubblecast 76 shows how water falls in droplets, rather than a continuous column. It is the same basic physics that caused what is known as "beads on a string" star formation between two merging galaxies in the cluster SDSS J1531+3414.
More information and download options: http://www.spacetelescope.org/videos/heic1414d/
ESA/Hubble, NASA, Luis Calçada and Martin Kornmesser.