Brains!
Not knowing why you start to move towards an area of the darkness. Something seems to be pulling you that way from inside, but nothing you can seem to explain even to yourself. You can tell others are moving around you, but not exactly who or what they are. From the faint uneven scraping and thuds of footfalls you can tell they appear to be moving and awkwardly as you are.
You are sure you can't exactly call it walking, but you are moving along on two legs that seem to shake and wobble a bit below you. Occasionally you can tell you bumped into something about half your height, but they are solid and don't move and you can't actually feel anything when it happens. Not even your own legs.
As you continue to move this direction you feel that something inside you start to lurch slightly more strongly. It is urging you to keep going. You still can't tell what it is but you have to obey it. It knows what you need even if you don't.
What is this? Why is it guiding me? Where is it guiding me?
The others around you start move in closer around you and you can tell they occasionally bump into you. They seem to be as unconcerned with it as you are, since they just continue to move on the same direction you are. But at this close range you can finally make out the basic shapes of them moving around you.
Most of them seem to have two arms, two legs, and head, much as you seem to feel like you do, but some of them are missing one or more of these parts. This doesn't seem to hinder them from trying to move towards the darkness with you.
Are they being driven by this too?
In the darkness ahead of you a larger shape appears to form as you approach. A large box like thing, taller than you are. There are already others nearly at it.
You see them reach it and start to bang on the walls of its sides. You can hear the deep thuds and soft scrapes as they paw at the object. You can feel that thing inside you starting to grow stronger. You know you have to get inside this thing too. There is something you need inside.
Suddenly there is a bright light coming from two small squares within the object and that shine upon the others like you. They start to move towards the light and reach for it, but you just keep moving where the feelings tell you.
You reach the object and see the smooth flat surface before you. Your hands reach out and touch it. It appears to be solid and hard as you run your hands down it, trying to find a way inside. Inside to where the feeling leads you.
The urge is welling inside you now. The thing you need is close, if only you could be inside this thing. You bang on the wall of it again, but it doesn't move. The urge is stronger. There is nothing more you want than to fulfill this unknown need.
What does it want?
Just then the wall before you moves slightly and a large line of light suddenly appears next to it. Within the light you see fingers grip the edge of the light and a head appears inside it. Not the head of one of you, but similar. This is what you need. It's inside these fingers, inside this head. You must have it.