A guy acted as a human wakeboard for his friend. He did it by lying on his stomach on a wakeboard, as his buddy stands on his back. They each have their own rope handle, and when it starts pulling . . . off they go "tandem wakeboarding" across the water.
This guy acted as a human wakeboard for his friend. After lying down on their stomach on a dock, their friend climbed onto their back and was pulled across the water.