I've always wondered about the relationship between the future observable universe and black holes. Since space is expanding, far away objects that we now see will eventually move away from us faster than the speed of light so there would be no way to get at them any more. This seems similar to dropping yourself in a black hole: when you cross the event horizon you won't be able to get back to the objects outside of the black hole, unless they're dropping into the black hole too. Also, the bigger the black hole you drop yourself into, the less you'll feel it because the tidal forces become smaller. I wonder what you would see if our galaxy and surrounding galaxies were dropping into a super big black hole. Would the black hole take up more than 50% of the celestial sphere? Would everything then be moving away from us at an accelerating rate?