"You like anything that breathes," John shot back with a frown, looking at his readings with a frown. There was radiation but it wasn't too bad. For radiation anyway. If he didn't get inside that ship then he was probably going to die slowly and painfully, it was a matter of getting away from the exposure that mattered. With a sigh, John gave Jack a look that was just on the verge of a sulky child who'd been proved wrong.

"Well. Shit," John said bluntly as he turned to Jack, a mischievous twinkle in his eye. Oh how could he resist one more chance at giving Jack a shock because hell, they'd spent days together with Jack waving his authority around. Time for John to take the piss.

So, with a shrug, he cocked the gun back and without little thought, he fired.

And nothing happened. John grinned playfully, pressing it a few more times because he knew this was going to happen. For two reasons. One, the gun was entirely empty. And secondly, he was pretty sure the Doctor, being the smark bloke he is, already jammed it. Holding it up playfully, he offered it to the Doctor standing in front of him. "You cheated."