Now think about yesterday: you walked out of your house. Straight, on the sidewalk, following the wall on your right, till the end. Stop. Zebra stripes. Look right. Look left. Walk. Up on the sidewalk. Safe. Walk straight. Straight. Straight. Stop. A hole in the ground.
Suddenly brought back to consciousness, you realize that your routine has slightly been modified. Straight is not anymore an option. You adapt your rout, and make a detour around the hole. Look left. Look right. On the left. Turn. Down on the street. Carefully to avoid cars. 2 steps. Right. Up on the sidewalk again. You bypassed the hole. And are safe back on your sidewalk where to walk. Walk. Straight.