A flagellate (probably Rhynchomonas nasuta) swimming between Caulobacter cells, hitting a long stalk, which is bended reversibly, but not released from the ground. What happens next? Look at the other two Caulobacter cells... Seek them at the end... The next page shows the event enlarged in slow motion.

Adhesin, the substance fixing the Caulobacter holdfast to the ground has been claimed to be nature's strongest underwater glue. It was found to hold at least 680 kg per square centimeter.