Who would have expected an explosion like that! This was the description with the video:
"My buddy and I rode the Alaska Railroad out to Spencer Glacier Whistle Stop and tent camped over night at Spencer Glacier. We went kayaking in the glacier bay and witnessed a MASSIVE event as a chunk of a glacier calved about 50 foot from us and created a 10-12 foot wave.
We were pelted with chunks of flying ice and buckets of water. To say we are lucky to be alive is an understatement. It was an absolutely stunning phenomenon to witness (and survive) .
We learned our lesson and will give glaciers the space they deserve next time we are out exploring."