Third chapter up and back to the marauders - sorry about switching it will make sense next chapter.
By the way, I try and update every day because the chapters are very small.
If more people review, I know more people are enjoying the story and I might be able to stay up a little later and make it two a day!

They all landed face first on the hard, stone ground of the dungeon. One by one, the marauders rose, rubbing their heads and moaning.

"Uh, everyone alright?" Sirius asked. Everyone nodded.
"Good, then where the heck are we?"
"We've time travelled you idiot!" Lily yelled, fully recovering from the fall.
"It's not my fault!" Sirius yelled back defensively. "Blame your Slytherin pal! Where is he anyway, I want to give him a good - "
"ITS NOT OUR FAULT YOU WERE MESSING AROUND WITH THAT STUPID TIME TURNER!"
"We were fine until you showed up!"
"WE WERE TRYING TO DO THE RIGHT THING!"
"You were being bloody interfering and you know it!"
"WHAT! HOW DARE – "
"Shut up!" James hissed suddenly.
"Don't tell ME to shut up, potter, I swear I'll – "
"Seriously! Shut up! Both of you! Can you hear that?" Silence rang through the potions corridor, as everyone listened hard for whatever it was James had heard. The soft thud of footsteps echoed through the potions corridor.
"RUN!" Peter yelped. He was the first to bolt down the other end of the corridor.
"Wait! Maybe – "Remus started.
"If anyone is down there, you're getting the punishment of a lifetime for snooping around my corridor after hours!" a blunt voice called from upstairs. Remus gasped, and stumbled down the steps after Peter, closely followed by Sirius and Lily.
James, however, didn't budge. He was a very trusting person, (too trusting at times) and believed that this person could help them out, whoever it was. It didn't matter if they were friendly or not, because he and his friends needed help.
The footsteps grew louder, and more menacing. James was starting to have second thoughts, but nevertheless stood his ground.
A man with a hooked nose and greasy hair turned the corner, and glared coldly at him. He thought he saw the corner of the man's lips twitch into a triumphant snigger.
"Well, well, well, Potter" he sneered. He raised his wand, and before James could even ask the man how he knew his name, sent a curse flying at James, which skimmed past his ear, missing him narrowly.
James didn't need telling twice. He ran for it, the same way his friends had gone. He could hear footsteps approaching from behind – the man was pursuing him. Another curse whizzed millimetres over his messy hair, and (more out of habit than anything) James reached up and ruffled it, before skidding to a halt, and turning down a sharp and well concealed corridor.
He didn't know if the man was still following him. All he knew is that he wanted to put as much distance as he could between them. He spotted an ominous looking cellar door, and instantly decided to take a risk. He reached for a bar, and praying it was open, pulled.
Astoundingly, the door swung ajar. James bolted inside, and slammed it behind him. He leant on the door for a few seconds, rasping, and thinking hard.
The man had recognised him – and James had recognised the man vaguely – he looked very familiar. But from where? James racked his brains, and still came up with nothing.
He turned around, shut his eyes, and let his back slide down the door until he was sitting on the stone cold floor.
He'd get out of here as soon as he knew the man had given up. Then he'd find the others, and figure out what was going on. He'd go under the cloak, in case anyone else tried to hex him. James thanked his lucky stars he had had the cloak with him at the time. He opened his eyes.
James was able to stop himself from screaming at the last second. He sat there and gaped at what was at the other end of the tunnel, not daring to make a sound. James stood up slowly, and desperately tried to wrench the bars open. It was hopeless. They'd had some enchantment placed on them. James cursed himself for falling for the trap – there was nothing left to do except wait for someone to come.

But it could be too late by then...

hmmmm... can anyone guess what was at the other end of the dungeon?
hint: remember, this is the end of Harry's fifth year, and it was briefly mentioned in the fifth book. It was not a vital component to JK rowling's story line