A similar event happened on a Fourth of July in Lake Washington
right in front of us. We were on land at my inlaw's place having lunch.
The lake was really busy with lots of power and sailboats. Boat chop was everywhere.
Two guys in a 26' speedboat hit a Bayliner wake. Normally this wouldn't be a problem, but they were both sitting on the top of the seatbacks! They went flying straight up and the boat kept going at full throttle. It immediately went hard over and ran in circles. They both tried to swim into the circle, but other boaters and people on shore yelled to get away. Finally the Seattle
Harbor Patrol showed up to shoo everyone away. It took an hour and a half before the boat ran out of fuel
, but it never hit anything!