hmmm

Back tire and seat detach from the bike to become a unicycle.

Yes and I started imagining a Hollywood movie plot. Spy steals something important and big, puts the object in the blue car’s trunk and runs away. Police starts pursuing. But they knew that would happen so they run to a cargo van that was strategically placed in an alley. But there’s no time to transfer the object and someone sees them hiding the blue car inside the van and starts pointing. So, spy asks for help and their team steals a truck. Time is short, so they ram the van inside the truck to make their escape.