You and Cas just came from talking with one of the family's victims, and naturally stopped by a fast food, Dean following along. You went in line to get the food, but then quickly realized he hadn’t followed you, so you called him.

“Cas! Get over here! Buddy system, remember?”

He gets to you almost instinctively, holding your hand. “Sorry, I forgot. Safety first.”

“We're in a fast food, you don’t need to hold hands!” Dean says exasperated, as he joins them.