In all the cases of blade release from the fan, in the reports I've seen, the blades were released centrifugally, no forward motion.
Except for the DC-10 over New Mexico where a CF6 fan blade was liberated and exited forward, walked up the fuselage, broke a window and the passenger was sucked out with his remains never to be found.
Also, there was at least one incident where the shaft to the fan on an RB211 engine sheared releasing the entire fan which spun out forward and away from the aircraft.