[There's a loud clatter as this person's PORTAL is sent to the floor and activates, right in time for a voice to be carried through it.] --what?! No!
[The speaker--shouter, really--appears to have run to the mirror in his room and is staring at it, his shoulders visibly trembling with barely-held back anger.] No... I can't be... this isn't--
[A few seconds pause, he clenches his fists, jumps backwards about a foot, summons... a really ungainly-looking
sword to his right hand, and--
[--a shout, a rather powerful-looking swing, and a resounding crash as the mirror falls to the floor, but doesn't break. There's plaster falling with it, and it's clear that he swung the weapon hard enough to embed it in the wall. Then, aside from the slightly heavier breathing from the young man, there's only silence.]
[The image coming from the mirror doesn't look like it's nearly troubling enough to evoke such a strong reaction: A young man with white hair wearing a lab coat and an older man wearing an eyepatch walking alongside him. It continues to follow them, until the young man in the room sinks to his knees, the weapon he had summoned disappearing the same way it had appeared.]
[Softly, he speaks up again, the anger now replaced by desperation.] Send me back. I don't know who you are, or how you did this... but you have to send me back. I can't let him win like this! There's no one left that can stop him--you have to send me back!
[He seems to be completely unaware that he's being filmed. Do clue him in.]