"Dean! Quit it! Stop being a child!" Even as the words were coming out Sam was still fighting back. It was just like when Dean was bigger than him and holding his comics way up high so he couldn't reach, even when he jumped. Well, ha! He wasn't short any more. He was in a tangle of limbs though. He smushed one hand into Dean's face, smothering him, while reaching for the bar.
Of course then he had a far better idea. Two could play this game! And so he swiped the Impala keys and held them out as far he could.