Anyone who has learned to ride a bicycle has experienced the feeling that one will never master it until suddenly, you get the hang of it and feel that sense of exhilaration as for the first time you cruise along without fear of falling. The bike now seems so stable that you cannot imagine why it took you so long to learn. But why it is so stable is not easy to understand. I have written before about how the stability of the humble bicycle is actually quite mysterious from a physics point of view.
But once you have learned to ride it, it seems like you can never forget it.
But is that true?
From reader Tadas I got this fascinating video about someone whose friends gave him a bike that they had adjusted so that when you turn the handlebars to the left, the wheels turn to the right and vice versa, and invited him to ride it. The video shows what happened and what he learned from the experience of trying to master what he thought should have been easy.