Oh that's really cool, I always do that when I bike because it reminds me of some rollercoasters. Some of them (not all) do the same thing when a tight turn needs to be taken smoothly: This was the first one I could find. You can see the track banking to the right before banking all the way to the left during the ascent. Never really knew why this was useful, I only knew that it was a thing. It probably makes for a better heartline then, thus for a more comfortable turn.As Ruina explains it, a bicyclist starts a turn to the left by "countersteering" to the right – briefly turning the wheel away from the intended turn. That makes the bike start to fall left, in the direction of the intended turn. To prevent falling the rider then steers left, but not enough to fully regain upright balance. The rider is then in a steady turn to the left, with gravity trying to pull the rider to the left and centrifugal force pulling up to the right.
