"Assuming I was for some reason working on a thruster I didn't disable beforehand and that the sudden acceleration doesn't kill me, I'll send a very impolite and probably extremely terrified message to C&C. They can't help me fix the problem if they don't know there is a problem. Best case scenario would be to cut forward engines without applying braking thrust, as that would let me pull myself back to the ship via the tether or use the air gun like a thruster to propel myself back. For extra safety, I could use the air gun to move from behind the ship' silhouette. That way, if breaking thrust is applied, I'll be clear of both the engines and the hull itself, saving me from getting incinerated or smeared across the hull.

If the ship must for some reason maintain constant acceleration, then I might still be able to use the air gun to move myself from behind the ship. This is a longshot, as the ship's constant acceleration would try to keep me in the 'starting' position. As long as the ship remains under constant thrust, I see no reliable way out of this mess." - Astrid[hr]EDIT: And of course further instructions come just as I post (Ain't no 'max' speed in space :))