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

When a moving bus brakes-to a stop : Our body is also in motion along with bus, but due to sudden brakes, the lower part of our body comes to rest as soon as the bus stops. But the upper part of our body continues to be in motion and hence we fall in forward direction due to inertia of motion. When the bus accelerates from rest we fall backwards When the bus is stationary our body is at rest but when the bus accelerates, the lower part of our body being in contact with the floor of the bus comes in motion, but the upper part of our body remains at rest due to inertia of rest. Hence, we fall in backward direction.