'If you need help, just ask': Boat school offers lessons after jet ski blunder puts Porsche in the water

A Porsche owner ended up landing his luxury vehicle in the water in a botched attempt to launch a jetski.

The black Cayenne was filmed floating on a boat ramp with the still-attached jetski bobbing nearby.

The mishap happened at Woodman Point, a suburb of Perth in Western Australia.

Perth Boat School posted the footage on its Facebook page, with the message: "Saw this happen to a Porsche today at Woodman point while we were doing liferaft training.

"Thought it would be a good time to say that we can also train people how to launch boats ... if you need help, just ask."