The bay we were in filled with ice in minutes. From a few bergs in the pretty blue water to the set of Frozen. Ice crowded into the boat and we were gently rocking with the waves from three or more slides. Then, perhaps weakened by the last slide the area to the right began to peel off less than a minute after the last one stopped. This time it was a huge slice of the glacier, perhaps as long as a mile or more with just a single section about 2500 feet across. The berg then turned over with the black side up where it had scrapped the rocks for centuries. When it turned over a large wave rocked the boat and ice chunks taller than a three story house were floating everywhere. We were not in any danger but it felt a bit tense as the captain - who has done this for 27 years announced that this was the largest calving he had ever seen and we needed to leave so we could still push our way through the icy waters. What an amazing event to witness.