I wouldn't over-think it.
(a)After a deck run of some 450-500' we only ever saw 90-95kts-ish, so there's no way you're going to accelerate to 100kts inside a C5.
(b)The Harrier always recovered really well after a slow speed 'unusual position', so even if it just trundled out of the back of the C5 and fell to earth for a few seconds, it would be flyable after a very short time of freewill. Just leave the engine at idle and the nozzles aft and your intrepid pilot will be fine.......so long as the C5 is not at low level :-)