I loved this video from Smarter Every Day, where host Destin Sandlin learns to ride a bicycle that has been custom welded to reverse the handlebars.
It sounds easy—all you have to do is think left when you normally think right, and vice versa. Can’t be too hard, right? But it is hard… very hard.
After he learns to ride the reverse bicycle, he then has another big problem: how to switch back to an ordinary bicycle. Turns out that’s really tough, too!
Lesson: “Once you have a rigid way of thinking in your head, sometimes you cannot change it, even if you want to.”