PESO - Crack, Boom, Splash

[Tom C]

From a trip to Alaska 2 weeks ago.  This is Holgate Glacier calving in the 
Kenai Fjords National Park.  The name describes the sounds as it occurs.  
Imagine the crack of a lightning bolt with no flash.

http://www.photo.net/photodb/photo?photo_id=3552323
Tom C.