"Who's there?" Harry shouted, reaching beneath his pillow for his wand and lighting the room with Lumos.
A tall man stood at the head of the bed, but he looked filthy. His long black hair was tangled, with quite a few blades of grass, bits of dirt, and other things caught in it.
At the sound of Harry's voice, he turned his face slightly. Harry could not make out his features clearly, but his disheveled appearance and blood-red eyes still allowed Harry to recognize him.
He had seen that face far too often lately. It was Sirius Black!
The others in the dormitory had also been woken by Harry, though most were still groggy.
"What is it, Harry?" Ron murmured. Then he opened his eyes and saw Black standing right in front of him. He froze for a moment, then let out a piercing scream.
It was a scream of fright.
That scream seemed to startle Black too. The next moment, he turned and ran.
"You're not getting away!" As a Gryffindor, Harry could hardly avoid charging in recklessly at a time like this.
With a flick of his wand, Harry sent a Stunning Spell flying at him.
The man who appeared to be Sirius Black reacted extremely quickly. His knife hand did not move, but he raised his other hand and swept the wand he held through the air, striking Harry's spell precisely and instantly breaking it apart.
Harry thought Sirius Black seemed to glance at him, but the next moment, he leaped backward and slipped out through the dormitory door.
"Don't think you can run!" With his blood up, Harry did not even stop to put on his shoes, chasing after him barefoot.
"Harry!" Neville called anxiously, picking up his wand from beside his pillow and following him