Pedals, seat, who needs them? Not this German design duo who have radically reinvented the bicycle.
Tom Hambrock and Juri Spetter's "Fliz" bike would have riders strap themselves into a harness and walk or run under its frame before tucking in their legs when they reach full speed.
While it may remind you most of Fred Flinstone's foot-powered car, the concept bike was inspired by the 1817 "laufrad", a forefather to the modern bike. The aim was to create an eco-friendly and healthy way to navigate crowded urban environments.
Looks a tad awkward? Not so, say the inventors, claiming the Fliz offers "a comfortable, ergonomic ride between running and biking."
Built with a laminated glass and carbon fiber frame, the bike has been entered in the Dyson Award design competition, where it could take home a £10,000 prize. Yabbadabbadoo!