Yeah, I'd love one. I'd love any memebike really.
Check out this guy descending an alarming speeds on one (shows up at around 1:10)
https://www.youtube.com/watch?v=4ehLlNL7pZ4>>1236163Think of it like this: when you pedal normally, you're engaging the inner chainring and one of the cogs regularly, while the secondary cog freewheels (or rather rotates backwards) since the chain is engaging it upside down. The opposite happens when you pedal backwards.