During the first day of competition at the Race World Offshore world championships in Key West, Fla., on Wednesday, two boats competing in the Super Stock class simultaneously flipped entering Key West Harbor. The two 32’ Wright Performance catamarans were running side-by-side at speeds around 100 mph. Being so close together affected the way the air came off the boats and caused them to draft off each other, causing them to take flight.

Check out a video of the incident shot by Cole McGowan.

Each boat has a driver and a throttleman and they are strapped into racing harnesses during competition. The boats have escape hatches in the bottom of the cockpit between the hulls and all four crewmembers on the boats emerged from the cockpits. They were treated for minor injuries at a local medical facility.

Racing continues today from Key West at 10 a.m. and the champions will be crowned when competition wraps up on Sunday. You can find a full schedule by clicking here.