Disko Bugt, Greenland
A Russian photographer, Alex Perov, has captured the split second that huge blocks of ice fell from a giant 160ft-tall iceberg in the middle of the ocean.
The incredible moment happened by chance when Alexander Perov tried to take pictures of a yacht passing in the iceberg's arc.
However, his awe soon turned to panic as the falling chunks crashed into the sea, setting off a big wave.
'The collapse lasted around seven seconds and I didn't anticipate it. The primary idea was to take a shot of the yacht in the arc of the iceberg.
'I had a rare opportunity to see everything from the very beginning and to take pictures of the whole event.
'By chance, all the settings of the camera were set already for this kind of shot.
'When it collapsed, it sent waves through the water which rocked the boat.
'When we heard the blast, we quickly turned the boat from the iceberg and sped away to avoid turning over.
'The specific problem for photographing it was I could not take the picture normally as I had to hang tight in the boat while we sped away from the wave, which seemed to me like a tsunami.'
Wow! He had the courage to do it!