As it "fell" free, bearing in mind it would still have a fair amount of fuel in its fuel system and would be burning and turning, I bet it out accelerated the B52 it was hauling along once freed from that onerous burden.
That only works if it's aerodynamicaly stable. Any pitch or yaw forces on the inlet will result in a bicycle wheel effect and a snap turn following gyro forces, the resulting drag should put it behind the aircraft petty quick.
Of course if the cause of the release was a massive engine failure YMMV