Actuality
A long while ago, many a year before the 'incident' there was an aperture employee, named Will. Will enjoyed working at aperture, so did most people.
The year was 1976, Most scientists in the facility had started packing their desk things and moving on up, closer to the surface.
Will was not leaving, not yet anyway, he had to make sure no experiments were left behind. 'it's suicide' he thought to himself, 'why me? Why do I have to go down there? Its been condemned for years'. He walked to the closest site manager and spoke "most of the other shafts were cleared out months ago, it seems a bit dangerous to go all the way down there don't you think?", the site manager replied "yes, it is quite dangerous, but you have to, reports say all mantis men have been locked up, go on, hop to it" and with that, he left, heading for the tunnel marked 'test shaft nine'.
Of course, Will wasn't important enough to work in test shaft nine, or test shaft one for that matter, no, he worked in test shaft six.
Test shaft six was quite an interesting one, it was mainly research and development, especially for the mobility gels, every wall, ceiling and floor were covered in the different types of gel, the three main gels and a few other experimental ones...
Some of these gels included; The immobility gel (making your testing come to a complete halt) and anti-grav gel (the stuff that lets you walk on the walls and ceilings of aperture, great for construction purposes).
Will couldn't delay this thing any longer, he strapped on his experimental long fall boots and packed a bag of a weeks-worth of provisions, just in case this mission took longer than a day.
Will stepped out onto the service lift, ready to go down..
About halfway down he heard a noise, like bridge cable breaking, and it was! Someone or something must have cut one of the cables, the elevator jolted and Will was thrown off the side, he hit the side of a test sphere and went spiralling downwards into the foggy depths of aperture...
Yes.. the first part of this story is short, but I want to know what people think of it before I continue and waste my time. So yeah, if you like it, I'll make future chapters longer and better. Oh by the way I don't own any of this portal stuff blah blah blah it belongs to valve and valve alone.