I really liked this! It's kind of a nice change to have a credible explanation for a superpower that's not "An ancient device just made it happen." (I am so guilty of that one, myself. Ancients are just far too easy to use as an explanation for everything that doesn't make sense.)

It's a really nice choice of superpower for Rodney, too -- embarrassing and almost-useless enough that it makes sense that we've never seen him use it in the show (although it probably would have come in handy when he was stuck in that Wraith cocoon), but still useful enough to be cool.

I'm actually far more impressed with the ability to fit his hands into tiny spaces than with the phasing through doors -- as long as that takes, I'd probably never dare use it for fear of suffocating (or, in this situation, getting caught by the guards while I'm sticking half-way through the door. Now that would suck.) On the other hand, when he's working with that fiddly Ancient tech, it's got to be really helpful.

Really liked your first sentence, too, or actually the whole beginning of the story --tortured John, Rodney's guilt, and attempts to take care of him...

John trying to figure out what the hell Rodney was panting about on his bed made me laugh out loud, especially the instant suspicion that he's masturbating. Hee.

This was really great:

So I grabbed the gun from the sleeping guard and, uh . . . well." The flashlight beam trembled a little. "Then I unlocked the cells, and --"

Great way to show that Rodney had to kill the guard, and isn't exactly happy about it, just through body language.