Twin Falls/Hyalite

Yesterday while belaying at the base of Twin Falls, right side, a small slab of snow to the right of the climb destabilized and fall onto me. I managed to stay standing and totally ok, but the rope coils and a water bottle were pulled down hill. It could have pulled me down, causing me to pull off my belayer. I think a piece of ice fell from the climb and triggered the slab as I heard a noise, though it could've just been the snow spontaneously cracking.