The hydro-cycle - a sort of pre-hovercraft item; really more like a pedal boat with a higher seat.
Location of events unknown / unclear.
MS top part of a bicycle mounted on platform; with 2 long floats on sides - like mini-pontoon. The pedals activate paddles to make this thing move. CU man in a jacket; cap; sitting on the hydro-cycle. MS other man standing and pedalling away.
MS of him coming under a bridge; with passenger on the front. They ride past camera. Quick MS of one rider on the hydro-cycle.