Sam was sitting on his motel bed and researching on his laptop, trying to ignore Dean, who lay sprawled on his own bed, watching television and chewing on a piece of gum in the most obnoxious way possible.
After a particularly loud smack of gum, Sam couldn't take it anymore. He whipped a pillow out from behind his back and chucked it at his brother as hard as he could. Dean squawked and choked for a second, then yelled, "Dude! You just made me swallow my last piece!"
Sam smirked, even as Dean's pillow hit him squarely in the face.