cause it´s fun!

This Germans news show report from 1953 shows the inventor of the "Wasserläufer" riding his hydrofoil in the river Isar in Munich! Translation of the news report: "And another patent for advanced mobility. The Wasserläufer a simple machine based on complicated calculations. You push water and move. The father and driver of this machine is a engineer in Bavaria. Up and down, up and down without any rudder or paddle wheel. Everything self powered with muscle power and ingenuity."