The eastern coast of Newfoundland, Canada, is one of the best places to spot icebergs, but it's important to keep your boat a safe distance away.
This group were admiring an iceberg located close to the coastal town of Triton when the snowy chunk began to flip over in the water.
The extraordinary event was captured on camera as the boat backed away.
Newfoundland and Labrador is the most easterly province of Canada. Situated in the country's Atlantic region, it incorporates the island of Newfoundland and mainland Labrador to the northwest.
Icebergs are common to the area - this one, though, is tiny in comparison with the world's largest.
Huge chunk of ice
Iceberg B-15, photographed by satellite in 2000, was the largest recently recorded iceberg. It was measured at around 295 km (183 miles) long and 37 km (23 miles) wide, with a surface area of 11,000 square km (4,200 sq miles).
This made it larger than the island of Jamaica. It broke off from the Ross Ice Shelf of Antarctica in March 2000. It broke apart in November 2002.
The largest on record was an Antarctic iceberg of over 31,000 square kilometres (12,000 square miles). It was sighted 240 km west of Scott Island, in the South Pacific, by the USS Glacier in 1956. The total area made it larger than Belgium.
In terms of height, icebergs generally range from 1 to 75 metres (250 feet) above sea level. The largest known in the North Atlantic was 168 metres (551 feet) high, which made it around the same height as a 50-storey building.