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Why do you fall in the forward direction...

Why do you fall in the forward direction when a moving bus brakes to a stop and fall backwards when it accelerates from rest?

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When the bus is moving, our body is also in motion in the direction of motion of the bus. When brakes are applied, our body in contact with the bus comes to rest but the upper part of the body due to inertia, remains in motion in the direction of motion of the bus. Hence we fall forward.
When the bus accelerates from rest, the lower part of the body in contact with the bus comes into motion with the bus, but the upper part of the body tends to remain at rest due to inertia. As a result we fall backward.
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