It's been an overall crappy day for Dean.
He'd gone to sleep in Bobby's house, after spending the last few days at Mary's for Thanksgiving and such. He and Sam had wandered back at some point, having a few beers falling asleep on the couch instead of dragging their asses up to bed, and that probably works out for the better, considering the fact that when Dean wakes up, the house has vanished.
That woke him up relatively fast, combined with the fact that he'd just woken up with a metric crapload of new memories, something that hadn't happened in a while, and suddenly, everything was flowing in-- Sam's Lucifer's vessel, the Antichrist, The Trickster's an angel, Crowley, the Colt, Jo, Ellen, the Colt doesn't work-- and Dean's nearly overwhelmed by the weight of it, of the fact that Bobby's house is gone on top of all of this, which means Sam is gone, which means...
Dean's at the very near point of breaking down, which sucks immensely.
He manages to pull himself together enough to make his way to the Impala, which, thankfully, is still here. He doesn't get in, though, just stands there for a minute. In that minute, he realizes that his tablet is on, and has been recording him staring at the empty place where Bobby's house used to be. Snatching it off his wrist, he throws it as far as possible, making something of a wounded animal sound, and the tablet skids across the ground.
It lands in a position where viewers can still see Dean lean against his baby, fold his arms on the roof of the car and rests his forehead on his arms.
[ooc: sooo on top of Dean waking up with his little brother missing again, he's waking up canon bumped to episode 5x10, Abandon All Hope. Since he was at 5x03, a lot has happened since then, so it's a lot to take in at once. He's going to try to be macho about it, though. :/ ]