Sam gasped as the light came back on, the harsh light momentarily blinding him. He felt Dean squeeze his arm beside him, and looked around, trying to see more than spots and streaks of whiteness.

The room was exactly the same as it was before; the tanks were in the same position. This actually alarmed Dean more than anything else.

He walked to the door and moved the handle, not at all surprised that it was locked.

He shrugged at his brother and began to tug at the door, groaning and straining, trying to break the lock.

After a few minutes, however, he began to get breathless, leaving him fuzzy headed and dizzy.

He brushed it off as a side-effect of almost drowning, and continued to tug at the door, but the same thing happened a couple of minutes later; he sank to the floor, gasping for breath, a deep, throbbing headache starting to develop.

'Dean? What's the matter?' asked Sam, racing up the stairs and holding his brother up.

'Can't...Breathe...too good' Dean gasped out.

Sam breathed in, stupidly trying to test whether he could still breathe; he could, so what was wrong with Dean?

A few minutes later, however, Sam felt himself getting breathless, his head started to pound, and he started to feel really sick.

He keeled over to the side, vomiting on the floor. He clutched at his head, groaning against the pain.

Dean fell on his side, vomit leaking from the side of his mouth, causing him to choke.

'D-Dean...' Sam groaned, holding his stomach as he searched for his brother.

Dean held his brother's shoulder, mind racing to find out what was happening.

'What-what is this?' Sam choked out, managing to stand up.

He attempted to walk forwards, but he veered and juddered to the left and right, before finally falling to his knees and vomiting over the floor again.

'Sam!' Dean gasped, crawling towards his little brother and holding him close.

He couldn't do anything...he didn't even know what was happening...

Dean gasped as he felt Sam move under his arms; he opened them slightly and watched in abject horror as Sam began to jerk and move around, head lolling around, muscles tensing and contracting.

He's having a fit, Dean thought, panic ripping through his body as he moved away from his brother. He knew he shouldn't hold him still; just let him work through it.

But it was so hard trying not to help. He choked back sobs as he watched Sam fit his arms and legs convulsing as he jerked on the vomit streaked floor.

Dean clutched at his own head, the throbbing pain making it hard to see, as he watched his brother.

Finally, after what seemed like an age, Sam stopped moving, and lay still, panting on the floor, keening softly, clutching weakly at his head.

Dean lurched forwards, his chin hitting Sam's shoulder and he fought with unconsciousness to check if his brother was ok.

He found that he couldn't speak, the breath literally evaporating as soon as it left him. He keeled over, his forehead resting on Sam's shoulder, unconscious.

Sam looked around, eyes streaming, his face streaked with sweat, water and his own vomit, as he tried to pinpoint a way out.

From behind him, he heard heavy footfalls, but he couldn't turn, he had no energy. He had no idea what was happening...what to do...

He gasped as a mask was placed over his face, fresh oxygen pumping through his system. He felt Dean being moved off of him and watched as the same was done to him.

'come now Sam- you've got more fight in you than this!' he heard a rasping voice say, and before he succumbed and fell into unconsciousness, he heard a deep, breathy chuckle, ringing through the stone room, accompanying him as he sunk into darkness.

Wow, that was dark... but I hope you enjoyed!

What happened to the boys? Review me your guesses, it something very specific- then I will reveal all in the next chapter-there will be shocks a-plenty!

Please review this chapter; I would love to know what you think?