John happens to be passing overhead on a trip to gather some more snow (he's kind of always wanted to try and build a snow fort inside, ok?) when he hears a gruff, angry sort of voice from the vendors. It draws his attention, and he hovers for a few moments, listening. Sounds like Dean's giving one of the vendors a hard time. Bad transaction, maybe? Although how the hell would Dean know, afterwards.

Hmm.

He settles on the ground a few yards away and approaches, crunching through the snow towards Dean. He clears his throat to gain the guy's attention and gives a little wave. "Uh, you know those guys aren't really...like, people, right? I don't think yelling at them does much good."

Wait, was Dean one of the future people? God, John should really be paying better attention to shit.