Quite a few galaxies can be seen to be emitting these gigantic jets of radiation, presumed to be the reaction of the accretion disk to entering the event horizon or simply being spun up to relativistic velocities. As galaxies eat each other, on rare occasions, super-massive black holes collide, but they likely orbit each other for some time. I recall seeing one galaxy that had two of these gigantic radiation jets spewing in opposite directions, and on both sides, the jets slightly coiled around each other signifying a stable gravitational orbit. It's notable that the jets could even attain the level of parallel alignment. Or would it be inevitable?