Ong is basically right about the shoe-tying in principle. One or both hands learned how to tie a shoe better while in a particular postural configuration.* More of a question about motor control than physics though since there's nothing inherently in a left or right shoe that makes it harder to tie.

Either that or banana had a stroke.

* Or more aptly, the neural regions controlling the hand, since the hand itself is just the mechanical part of the system.