The caption for the March photo in the 1995 edition of the Penguin Passion calendar explains "Adelie penguins line up for a game of 'ride-the-ice-floe.' One after another, Adelies leap from the edge of a stationary ice shelf onto a passing floe. After a short joy ride of several hundred yards downshore, the penguins will leap off and head back to the jumping-off point for another go-around."
Some penguin places...
Our Penguins-in-Residence: Victor, Tuxie, & Nittany