"Aw, crap! He's getting away!"
Ryn stands up, and takes off at maximum speed towards the door, hoping to get another shot at the man before it closes.
Believing that a man who can fix a spacecraft is also usually capable of flying it, Ryn also hopes to get inside the ship with the man before he can initiate a pre-flight sequence. Ryn knows that he is on his own last legs, and that another hit could finish him. At least this way, he'll either succeed, or die trying.
(Ah, well, it's been a good life...)