"Everybody who goes down there is briefed by their guides what to do in the event of a calving," Mantler said, but he also admitted that the this particular incident "made it a closer call than usual."
One of the tourists posted about the experience, too.
“Before the glacier collapse happened, our tour guide told us when we heard ‘Boom! Boom! Boom!’ we have to run run run run. Thanks to the tour guide for saving our lives.”
Although a close call, no one was injured in incident.