"Yeah, you too," Sam said in a rough voice, crossing his arms and stepping forward. The expression on his face plainly told Ethan to get out, and the latter obviously understood it by the way he high-tailed it for the door with a quick good-bye thrown over the shoulder.
Sam didn't mean to literally chase Ethan out of the apartment, but it was hard to be warm to his girlfriend's half-naked ex. He bristled farther when he realized that when Ethan had gone into the shower, Sam hadn't even been home. Therefore, Ethan had thought it was entirely appropriate to just waltz on out in front of Stacey practically naked. Not that he wasn't fully covered up down there, but still.