@mbonsma This makes no sense, and I've been a pedestrian a lot longer than a driver. If walking out into traffic, you need to act like cars are big things that can only stop so fast. You also need to pay attention to curbs, uneven sidewalks, ice on sidewalks, the poles, the edges of cliffs, people who push strollers in front of you, bicyclists who think they don't need to stop for anyone...
If you're talking about cars hopping sidewalks...