damn. either he has extremely marvelous connection with super human reaction or he prefires at perfect moments. he is good. like when he enters the office, he gets the kills perfectly and how he talks to himself is adorable
He explained how he does it.
As soon as you see someone, you stop by stopping completely or if you want to move, push the button that makes you walk and you'll stop. As soon as you do, the crosshair will go down.