Dean was grinning at Sam's words. It was nice to hear him seem happy for even a moment and he arched his back to push the bar further out of reach, still pushing at his brother's shoulder when one hand was smushed into his face. Well, that was dirty fighting-- and there went his keys. Really dirty fighting, Sammy.
Protein bar dropped somewhere above his head, Dean made a scramble, under his huge younger brother, to reach for the keys. "That's foul play, you don't mess with a man's car or, by extension, his car keys!" He looped an arm around Sam's neck, using his brother's size against him to try to reach the keys as he pulled him closer.