Bungeesurfing - Switzerland
Bungeesuring - the 100% Natural Power - 0% CO2 emissisions way to surf a river.
Only with floating Water and a Bungeesurfrope TM made out of Natural Rubber, it is possible to surf on a River. Like a Jojo you going up and down the River with a speed up to 60 km/h ( 40 miles ).

Just being there will do it for me… Ah yes, Bern dow on the River Aare I presume.