void Fall()
    {
        //apply half velocity - http://www.niksula.hut.fi/~hkankaan/Homepages/gravity.html
        for (int i = 0; i < 4; ++i)
        {
            vel[i] -= grav * Time.fixedDeltaTime / 2;
        }

        //apply position changes
        for (int i = 0; i < 4; ++i)
        {
            if (lat[i])
            {
                pos[i] = below.pos[i];
            }
            else
            {
                pos[i] += vel[i] * Time.fixedDeltaTime;
            }
        }

        mesh.TransformBox(pos);

        //apply half velocity
        for (int i = 0; i < 4; ++i)
        {
            vel[i] -= grav * Time.fixedDeltaTime / 2;
        }
    }