http://en.wikipedia.org/wiki/Bloop---
In the heart of Philidelphia lies an old bar, with a man who sits in the corner 24/7, even when the bar is closed. The bartender can't tell you anything about him, but if you sit across from this man for 30 minutes, looking straight into his eyes, saying absolutely nothing, he'll take you to a back room. In this room you'll find a skeleton chained to the wall and a couple of artifacts, among them a diary and a ring. If you put on the ring and read the diary in its entirety, you will find yourself passing out, awakening as a woman, named Mary. You won't be able to control her; but you will live out her painful death and the circumstances that caused her to be tortured in the back room of this bar, by a gang of men in suits. You'll experience all of the pain until finally, she dies, and you'll find yourself at home, in bed, wearing this ring. The ring won't come off. You'll hear a knock on the door. Don't answer it; it's one of the men in suits. Climb out a back window, even if it's a 2 story house, and maybe you'll have a chance of hopping the fence and making your way back to the bar, where the man in the corner will be able to remove the ring for you. Everyone who answered the door, or was caught by the men, was never to be seen again.
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Have you ever walked into a room and felt that it was "bad" or "wrong" in some way, and then promptly left the room, perhaps making excuses on the way out? It's good if you left. There are parasites. They live in another reality, unable to exist on their own in ours; these bad places are places that they can see, as if they are looking in through the window between our worlds. That "bad" feeling is that of them looking at you. And the more they can see you, they creep closer and closer to your body.
If you stay in their gaze for more than about three minutes, they'll get you. And you don't want them to get you.. unless you like being stuck behind that window like they used to.. watching while they take upon your identity and using your life to live the lives they had to watch all this time.
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Ever wandered alone on the streets at the dead of night? Well, if you encounter a wizened figure in tattered robes and a hood, and you just can't seem to make out his face no matter which way you look at it, pay your respects. This man is infact Death himself. He only appears to sole travellers at the stroke of 3:33am, so most go their entire lives without ever seeing him "in the flesh", so to speak.
If you're brave enough to speak to him, he may take out an hourglass from his robe. The hourglass represents how much longer you have left to live. If there is plenty of sand in the upper glass, it means you still have a long time left to go before inevitability claims you. But if he takes out an hourglass that contains black flowing sand, then run as fast and as far as you can to the one you love before he finds you. And he will find you.
The black sand represents borrowed time.