A large wave caused by a collapsing glacier in Iceland has sent tourists running for their lives.
While no one was hurt in the incident, a video captured by a local mountain guide shows the panic spreading amongst a visiting group to the Breiðamerkurjökull glacier, in Vatnajökull National Park.
"I could see all of them start to move out of harm's way, and their guides also ready to jump into action if necessary, so I kept recording but with a watchful eye on people's movements," guide Stephen Mantler from Hafjall Tours told CNN.
The ice-fall - officially termed "calving" - was unusually big, and was preceded by a rumbling sound almost like thunder captured in the video.
"While calvings are fairly frequent at this time of the year, this was an extraordinarily large event and much closer to the shore than usual, which is why it was such a close call," said Mantler.
"In the end, most importantly, nobody got hurt or even wet."
The area where the incident occurred is in the remote south-eastern part of the country, and is only accessible with a guide. All groups are briefed about what to do if a calving like this occurs.