Same thing on a tread mill- When I get off of  a treadmill after running and
walk away, the objects that were once stationary- suddenly feel like they
are moving really fast.

>From: Marc Chrusch <[log in to unmask]>

>It's an optical illusion resulting from our perception and the way our
>brain processes visual information. When you stare at a moving pattern,
>such as the snow passing under you, your brain gets used to seeing
>movement. When you look at something that's standing still, you see
>movement, usually in the opposite direction, but with some folks it can be
>in the same direction. Psychologists have given a common name for this
>illusion - the waterfall effect. If you stare at a waterfall for some time
>and then look at the nearby rocks, the rocks may look like they are moving
>upward. The same thing can happen if you've been watching something moving
>(relative to you) and it suddenly stops, it may appear to continue moving.

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