HeisenbergsBicycle

You ride Heisenberg's bicycle from flower stall to picnic spread, but the more you know your position on the map, you lose information about your velocity and vice-versa.

 At each turn, you can only pick between the direction you're taking or the velocity (the other quantity will be assigned randomly).  It illustrates visually Heisenberg's Uncertainty Principle :

" In quantum physics, there are certain quantities that you cannot know with infinite precision"