You are sitting at a stop light. Dom Toretto pulls up next to you and starts revving. You are ready to throw down as well since you also live your life one quarter mile at a time.
The light turns green, you floor the gas. You are instantly pushed into your seat. But now think about the forces. The engine and wheels are providing a force forwards and the car is forcing you forward as you do 0 to 60. But you **feel** like you are being pushed backwards.
There is no real force pushing you into your seat; the real force is the car propelling you forward trying to catch Dom as all you see are his taillights. But it feels like someone is crushing you into your chair.
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