Gabriel + Dean + open = this is a mess guys
He'd been holding off all night, he really had.
And he'd been trying to behave. Honestly, Gabriel was sure he deserved some credit for managing as long as he had with only little bitty pranks. But moving knick-knacks on the mantle really only was interesting for as long as it lasted, and with Castiel already distracted by so many people in his home, it wasn't as if he got the pay off of his brother noticing those little changes immediately anyway.
By now though, he'd schmoozed with nearly everyone for a little while. Talked to the weirdo Brits, bummed a smoke or two while he stared wistfully at that treehouse. He'd delighted in talking to the dream-pony (who was tiny, excitable and adorable here), and gotten more or less buzzed.
Now he couldn't help himself anymore. He absolutely had to fuck with those stupid action figures in that stupid tree house. Gabriel knew, of course, that it only interested him because it was off limits, but that was reason enough, wasn't it? More than.
And come on. Dean's X-Men action figures? Nope. More like XXX-Men action figures now.