A rocking Ilulissat Iceberg, Greenland
A big chunk fell of this iceberg whilst we were nearby, and which sent multi-meter high waves in our direction. The sudden falling off made the iceberg rock, with a period of a few minutes. Here it's about half way up, which you can see from the position of the water-level ridge. The distance between the waterline and the ridge in this picture is, I'd guess, five to ten meters.