Olly had been told to go to his common room, so that's what he was doing. He assumed the other Slytherins were still behind him as he made his way down from the seventh floor. He was keeping his eye out, of course, in case he ran into the monster that was still on the loose. But his ears picked up a disturbance first. Someone was screaming. He looked toward the source of the noise. There were two people on one end of the corridor but as it seemed that neither of them had screamed he didn't pay them much attention and turned toward the other end of the corridor. That's when he saw the monster. And the two boys it was dragging behind it. For a moment Olly was frozen in shock and terror. That was the actual monster right there in front of him. What could he do? He couldn't just stand there and do nothing. There was no way he was going to just continue walking back down to his common room now.

"Stop!" That had been mostly instinct. He didn't really think the monster would listen to him of course. He had to make it stop. How could he do that? His brain was not thinking very quickly because it was terrified and under pressure. He remembered that he was still gripping his wand. But before he could even do anything it was already gone.