Good evening, both of you. I have brought you here because neither of you has anything resembling a sense of altruism. Everything you do is for your own benefit, and if you harm others by your actions, you simply don't care.
Now then, do you see that you are manacled side by side? I thought you would. But I think you first noticed the scar on your manacled arm. That's right, only one arm is manacled. But returning to the scar, you will see that it is rather poorly sticthed up. If you tear out the stiches, you will find a key. The key to the other person's cuffs. And before you get any ideas, I was careful to make sure that your bound arm was where the other person couldn't reach it. Wasn't that considerate of me?
Next, I think you see the thread, needles and alchohol on the other side of the room. I already sterilized the needles, the alchohol's to kill the pain so that you can work on each other. And you notice that each of your names is written by one of the needles? That's so that you don't pick up the wrong one. The needles are coated in a contact poison, but each of you has been given the antidote to the one on your needle. The threads are coated in antidote too (so that you don't kill each other by sewing up the wounds), but you can't work on yourself because that would bring the concentration of antidote in your bloodstream up to toxic levels. Oh, and you can't take the other needle and work on yourself either, because you'll absorb a bigger dose from touching the needle than the stuff on the thread can handle. And then, once you are no longer in danger of bleeding to death, you can walk through that door.
*begin tape 2 when they leave the room*
Now, do you see the two tightropes strung across that pit? I thought you would. The ropes, by the way, carry an electrical charge, not unlike that of a power line. If you only stand on one, you'll be safe, but on two...ker-zap. The solution, of couse, is to put on those rubber gloves at your feet, join hands, and walk across like that. Call it a trust exercise.
Oh, and there's another way to get across: If one of you hits the pressure plate at the bottom of the pit, a platform will rise up from the bottom. This platform, covered in soft foam (but it will only form once the plate is triggered), will gently raise you up to the top of the pit and to freedom. So, you can get out by tricking your "friend" into walking across with you, and then shoving him off and using the recoil to land on the platform.
Now that I've told you that, can you trust each other? Keep in mind that your partner is exactly like you; i.e, a sociopathic bastard.