Stan gave a short, sharp shove back at the portrait hole, knocking it back for a moment. It hit something, and then Ernie got it the rest of the way closed as Stan shouted something obscene after him.
Short of breaking into the Hufflepuff and pounding McMillan's face in, there wasn't much he could do but work of the anger. Ollie was always good for a match of something that would leave Stan cheerful and sprawled out on the ground, exhausted. Angry and agitated, Stan went looking for his friend.