The Di-Cycle, by GBO Design is an amphibious bike designed for the city of Helmond in the Netherlands, because the city has just as many watery channels as it does actual roads. Therefore, the residents all want to make like amphibians, skimming across water.
The idea is that riders would be able to skim over the water just as if they were going across the land. Somehow I just don’t see that happening. It’s more likely to flip you over and fill your lungs with water as it keeps going, eventually depositing your corpse on the road your soul never made it to. It remains a concept for the moment thankfully.