Foil kiteboarding is becoming a popular discipline, but it can be dangerous, especially for marine life.
Watch this controversial video filmed and published by Alex Soto.
He was riding his foil board when suddenly, the sharp blade hit a shark. Soto wipes out, but we do not know whether the predator survived.
The kiteboarder from the Dominican Republic was criticized for releasing it and not showing compassion for the shark.
Some of the world's most crowded beaches are banning foils from their waters. And they're not only a threat to humans but also to marine creatures.