A small group of tourists recently got more than they bargained for, while glacier-watching in Greenland. Jens Møller, along with his uncle and an Australian sightseer, got a little too close to a melting glacier when this happened.

And if you think that was cool, you must check out this harrowing video of a glacier imploding (though you may want to turn the volume down a little).

Via Redditor Geoinformer.