Books tumbled from shelves and birds took flight with a squawk. Tables toppled over and students found themselves falling from their chairs.

Then it stopped. There was silence for a moment, before McGonagall got up, along with Dumbledore. While McGonagall helped the students to their feet, checking them for injuries, Dumbledore drew his wand and started to examine the door. Obviously coming to the conclusion that it was harmless he reached out to open the door.

Someone beat him to it.

Dumbledore jumped back out of reach as the door swung open revealing a tall muscular man with a mane of goldy-brown hair, dressed in horribly bright scarlet robes. He chuckled.

'Well I'll be dammed. Salazar was right, the snake.

'Unfortunately he usually is.' A severe looking woman with her raven black hair drawn into a sharp bun, pushed past the man and into the classroom, where she gazed at the damage with amber eyes.

'He forgot to mention that the room would be in a tip,' the man added with a mischievous grin. The woman frowned.

'Helga's going to have a fit.

'Excuse me,' Dumbledore said, stepped forward from his position behind the door. 'Would you mind introducing yourselves?'

'Yes,' the woman snapped, but the man just laughed.

'Of course not. I am Godric Gryiffindor, his charming lady is Rowena Ravenclaw and somewhere in this castle you will find Salazar Slytherin and Helga Hufflepuff.'

The class, including McGonagall and Dumbledore stared at them in wide mouthed shock.

'What's going on I—oh, the poor dears!' A short, plump woman with bushy greying brown hair rushed in, shoving past Godric and Rowena and quickly starting to fuss over the nearest student, who stared at her in petrified awe.

'And this is the delightful Helga Hufflepuff,' drawled a voice from behind Godric and Rowena. Both of them spun round o see a tall man with jet-black hair and cold grey eyes, leaning on the doorframe. 'Greetings Time Travellers.'

'What?' McGonagall purse her lips as she took in Salazar Slytherin. Then she clapped her hands together. 'You can stop this joke now mister Potter. The fun's over.'

Everyone stared at their teacher, before looking at the esteemed Salazar Slytherin. He looked like potter, except older, with grey eyes and a rather different voice. Also the way he acted was very different, much more Slytherin. That settled it for most of the students. This couldn't be Harry Potter.

'I do not believe that this is mister Potter, Minerva.' Dumbledore said gravely. 'I believe we have, somehow, travelled back to the time of the Founders.'

Chaos erupted in the class. Students, most noticeably the Gryiffindors, started screaming and crying. If they were stuck here, they might never see their families again!

A low hiss could suddenly be heard over the shouts, gradually getting louder. Everyone except for the Founders froze as a large snake slithered into the room, hissing aggressively.

'Salazar,' Helga said, sounding upset, 'you've scared the poor dears.'

'It shut them up, did it not?' Helga sighed but nodded. Evidently they were used to Salazar by now. Unfortunately the same could not be said for everyone else.

'That was a most ... inventive method Mister Slytherin.' Dumbledore said, breaking the stagnant silence. Salazar smiled slightly as he looked at Dumbledore, who shivered unconsciously.

'You would have done well in my house, Albus Dumbledore, if not for your saving people thing.' He sneered the last three words,. Dumbledore paled. They were his words.