Statistically speaking, it's probably not entirely unlikely that there is someone out there who is enamored with cycling but fears pedals and really gets off on sex swings. Someone who wants to blend all three of those things together in one place. I know it's not entirely unlikely because it happened and they called it the Fliz.
At first glance, this looks like the sort of thing you should strap a child into in order to mock him. In a bygone era, they would have done this to mental deficients and claimed that it helped them exercise, but really it was just so the crooked and sinister staff at the institute could point and laugh as the little mouth breathers scooted around all ridiculous-like.
Looking at the Fliz, you'll notice a few things right away. First, you probably need to be making a noise like "Hherrrrrrrggghh!" the entire time you're using it. Second, with a slot for your head in front, you'll finally be able to do away with that pesky collarbone should you ever get in an accident. Third, every single pothole or speed bump will basically be like a punch to the head, which you'll deserve for strapping yourself into this big boy's exersaucer.
Some inventions don't need to be improved. Have you seen the electric fork? That's so f*****g stupid, its very existence should be a ruse just to find the names of people dumb enough to want it so they can be rounded up and put in camps. Likewise, the bicycle is pretty solid the way it is. You're not making it better by crossbreeding it with a Baby Bjorn and stomping around on two wheels crouched over like you're carting a load in your pants, looking to everyone like some brain-addled dingus who couldn't afford a whole bicycle.