Figured it out yet?  Of course it could not jump that high and there is no ladder on the back side.  Remembering that 70% of a floating iceberg is below the surface (as shown by the second picture which I did not take but was published on the web), it is a matter of physics (figured it out yet?). 

The iceberg floated ashore during a very high tide (probably a storm) and became grounded.  Probably with somewhat less than 70% of the berg under water the penguin swam and jumped the probably slightly more than 30% of the height to the top.  It then went to sleep.  Non-breeding birds spend their days to sea feeding and their short nights sleeping on a beach or on a large iceberg.  At the end of the season they spend about a month standing on shore molting the old feathers off and growing new ones for the next year.  So the next morning the penguin woke up in a quandry with no way down.  Fortunately, penguins can climb down sheer clifts using their toes and beak (they can stop their fall down a cliff by digging in with their beak and toes).  So that is the story.  Hope you enjoy it.  If you want to put the penguin/iceberg in place of my picture it would be an improvement. 

Have fun at the reunion.  Rennie