The Trampofoil was invented by Alexander Sahlin, a swedish engineer. It has a weight of only 12 kgs and just like Wasserläufer and Pogofoil it uses Flapping Wing Propulsion. Cause of the low weight it was the first really easy to drive human powered hydrofoil. But it had no floating devices, what makes it impossible to start from the water.
Video: Trampofoil Videos