Watch this shocking video as a diver loses consciousness during a freediving competition.

Cassandra Cooper, an experienced, professional freediver from Canada, had taken part in a sanctioned Double K IDA Freediving Competition in Mactan, Cebu, Philippines.

Before the dive, she had trained at Camotes Freediving Centre in the Philippines.

During the dive, due to a brief loss of motor control, she blacked out underwater and was immediately assisted by safety divers around her.

Cassandra said: “I was recovered immediately by the safety team and suffered no injury.

“I shared this video for educational and awareness purposes. 

“And I also shared it because, in freediving, like any sport, sometimes we find our limits.

“That’s why the best place to perform at a high level is in a competition, where the strongest safety protocols are in place.”

“I also want to tell people that they should not attempt something like this without proper training, supervision, and safety procedures”