Just to add a note of reality. My brother, on the cat ready to launch off the USS Constellation on a dark Indian Ocean night, once got a warning light--WINGS IN TRANSIT! Holding his salute, the signal to fire the catapult, in the raised position, he had the RIO transmit-SUSPEND THE LAUNCH! Thus halting all deck activity, locking the cats. The Catapult Officer stood in front of the F-14 while the crew disconnected them from the cat. Sure enough, they went uncommanded to full sweep back.
So extremely unlikely, like most things aviation-not impossible.
GF