I won't make numerical estimates here, but we can consider that: - the piece of meteorite had already achieved terminal velocity, - most of the remaining

I won't make numerical estimates here, but we can consider that: - the piece of meteorite had already achieved terminal velocity, - most of the remaining energy was lost on the collision with the layers of the roof and - final collision was dampened by the pillow, mattress foam and bed structure. By the size of of the object on the photograph, if it has approximately the same density of earth stones, the story seems 100% believable.