Forgive the title. Long ago I was told that if two black hole traveling rapidly relative to each other "brushed" past each other they'd pull each other in. I find it odd that a massive object traveling near the speed of light would suddenly stop dead in its track. Instead consider two black hole traveling past each other at high speed with a "good" amount of distance between. At the point of nearest approach a number of other smallish black holes, coming from various directions, intersect the straight line between the two large black holes. Imagine this as a beaded necklace where they all barely touch. Does this cable stop the two large black holes suddenly and rapidly pull them together? Does the cable stretch, but stay connected, and slowly decelerate the large masses? If this is true then what happens if the thickness of the cable reaches something akin to Planck's length?