"The Horn may open a wormhole and summon help from elsewhere in our coordinate system. But from their frame of reference, it might appear to cover a great distance in space and/or time. Therefore, I suggest we slowly disperse to locations where we think the gravitational instabilities may permit a wormhole to open--bearing in mind that if we go too fast, the sounding will not take place 'simultaneously' for all of us, so we had better be cautious."