A/N: Shw'mae (hello) everyone. This fic is the result of a reading 'Retribution' by BiteMeTechie and a silly lunch break with a couple of friends who were all hyped up on sugar and caffeine, singing on the top of their heads. I was sensible and didn't join in at all. whistles innocently Unfortunately, the silly song stuck in my head, and a plot bunny came a-nibbling. sigh I don't know which is to blame, plot bunnies or fizzy drinks.

Chapter One: Practical Jokers.

Rodney McKay strode across the mess hall purposefully, ignoring the friendly calls from his fellow team members and co-workers, offering him a place at their table. His continued disregard for their hails caused many of the other expedition members to turn their heads and follow his progress to the far wall, which had somehow become the Atlantis notice board for unofficial announcements.

Swiftly, Rodney tacked up the A4 sheet of paper he was carrying in a prominent position. Without saying a word, the scientist turned smartly on his heel and marched right back out of the dinning area.

Uh oh, groaned Elizabeth, That can't be good. Something was clearly troubling her Chief Scientist, and a pissed off McKay was something she – and indeed, the rest of Atlantis – would rather avoid. Deciding that some intel would be useful, Elizabeth got up from her meal and wandered over to the notice board to inspect Rodney's poster:

"Warning to the practical jokers of this expedition. Enough is enough. Put it back in my room by nightfall or suffer the consequences."

Well, she pondered, It's not very informative; I wonder what's been taken? Elizabeth made a snap decision and chose not to get involved. After all, Rodney has given them fair warning; if the jokers are smart, they'll give in. This isn't really a problem.

If only she knew how wrong that was.