This week on 2 occasions,1st I have seen a black mass go by my livingroom door,and my daughter also seen it at the same time,it covered my full door and blocked all the light from my bathroom and my hall way,and it moved very fast and seem to be very tall,there was know figure it just looked like a black shape,then on the 2nd time,I was sitting with my other daughter but this time it looked as if it was in the bathroom and just blocked the light for a couple of seconds then disappeared,and at the same time my daughter felt as if someone walked past her and caused a breeze,I have tried to take pictures but it shows up nothing,can anybody give me any information on black mass and why they appear... thanks