Imagine a world without bikes. No really, imagine it. It's pretty funny. Yes, there is a Subreddit devoted to the art of Photoshopping away the Schwinns from under would-be riders. Some people just look like they're leaping awkwardly into the air, others look like they're possessed by demons.
Recumbent bikes, not surprisingly, yield the most ridiculous images (as they do in real life).
Check out a few of my favourites below to see what happens when bikes disappear, or head over to /r/InvisibleBicycles for more Friday fun.