Very cool! Revisiting Rodney-of-48-Hours always intrigues me, and this is a fascinating variation. Liked SG-1's reactions around him, and their interactions with each other (the little moment when Daniel comes in to find Sam after she's just given Rodney the device, that was just a lovely bit.) Rodney's various lists of possible explanations were great, including his final addition to the whiteboard (oddly enough, "the cake is a lie" is the one thing that convinced me that it wasn't all in Rodney's head - despite Daniel's very convincing explanation of the symbolism of Rodney's future - since I know the existence of Portal is an accurate future fact - don't know if you intended it like that, but very cleverly done if so!)

But oh, what a painful dilemma he's left in - though if anyone could figure out how to rip through the time-space continuum to get home, Rodney McKay could, so I'll hold out hope and assume he manages it, somehow...!