Part One - What's going on?

He was walking faster and faster, as the steps behind him started to speed up. He saw a doorway on his left, and made a jump towards it, as the noise of someone almost running reached his ears. The door was luckily not locked, and he used all his weight and willpower to open it.
*black*
As he woke, he vaguely remembered the sound of footsteps closing in on him, and shook his head to get rid of the memory. The sound however, wouldn't disappear. He opened his eyes to find himself in a dark hallway, and he had no clue where
it lead, or who was walking towards him.
A moment later, the guilty shoes, and their owner appeared around a corner. There was no mistaking the long black robes strotting in his direction. He had no trouble at all recognicing his professor..but the professor did't seem to notice him at all. The man hurried past him, as if there were no rules against walking the castle after curfiew.
He got up on his feet in a hurry, letting his hands feel down..no, he hadn't just forgotten that he had slipped on his invisibilitycloak. The professor merely hadn't seen him. Strange. Not at all usual, not for any professor.
He gathered his thoughts for a brief second, and hurried after the man. After all, there had to be quite something going on, if him being out of the dormitory wasn't worth noticing.
*black*
Once again, he found himself slowly opening his eyes, hearing footsteps coming towards him. And once again he had no clue where he was. This had to stop. Immidiately.
He turned his head just in time to witness a truely scary sight. In a split second, before he realized what was going on, he saw himself, leaning onto the door to his potions-classroom, then he realized that the "himself" he saw, was ten years younger. He recalled that the professor was no longer his professor, rather his co-worker, and during the next split of that self same second, he remembered what he'd been doing before he fainted. Before someone hit_his_head!
He turned around to look down the corridor, and witnessed something he had faired to be true all these years, but known all the same, deep inside.
Half hidden, behind a column, but close enough to see properly, was his best mate standing. His eyes were teary, and his shoulders was shaking uncontrolled.
Harry had never quite believed Ron, when he several years after this had told him that he had been there. Never the less had he ever thought that Ron was telling the truth when he said that he had loved him before Harry knew the meaning of the word gay. Harry was obviously mistaken.
He suddenly remembered the knock to the back of his head, as he was about to dive into the pensieve located in Ron's office-closet, and figured he must have had finished his class of occlumency early to tell Harry off. He had been a spare second to late, and as Harry was heading back to reality, he tried to prepare for one shaking angry best friend.
*black*