Welcome Olympian, War Hero, Astronaut and... ...Who else?... Oh and you, to Aperture Science! Today we are going to test something that the lab boys call "The Positron Ball"! Where do they get these names from? I don`t know. (Oh and can anyone help me with...

Ok, so today we are going to be testing something with a normal name: Sensors! Unfortunately you may walk out of the test without some bones, fortunately we have whole magazines full of them!...