Pubisycles

Not a Physicist, so guessing a little. Both seem turbulent/chaotic systems that rely on the previous state. Each part of a dynamic flow/bike trajectory are small fractals of the initial instability/configuration. A bike is designed to steer straight - counter-steering - while moving, so it is unstable around the line/curve. On the other hand, fluid tend to become unstable at the slightest disturbance and if pushed forward, goes into a oscillating state that breaks up into eddies. I would guess that the bike's forward instability gets exponentially higher at lower speeds, and the bike trajectory lines is not pushed forward as with moving fluid above, so the bike shows another turbulent/chaotic fractal system with a different starting configuration. ..I think ;-)

I wondered why I was hungry

Pubic extensions

Symmetrical up/down? Or do you mean almost periodic right to left?

It's entirely expected. The anomalies are going to be on the furthest left and right; Bikes that fall down right away or ones that stay up longest. The average would be the densest area - bikes that performed "okay." The symmetry is also an expected function with the only options for the wheel to turn being left or right.

If these were not standardized releases, meaning, the energy used to push the bike varied from one to the next - say, because a person was pushing them and not a machine with a defined load - then it explains the short vs. long distances, however that would be normalized even with a predefined load and look similar to this... just bigger distances.

Are you a bike Medusa?

Probably

It's simulated.

It was performed virtually.

"It Takes Two Neurons To Ride a Bicycle" | Matthew Cook

Almost certainly not, the coriolis effect is so small on this space and time scale it's barely measurable even with advanced equipment.

Edit: also from other comments the bike is virtual anyways lol

It was done inside a physics simulation.

"It Takes Two Neurons To Ride a Bicycle" | Matthew Cook

Embedded here:

Now repeat 799 more times

I think they mean to the right like straight from left to right.