First round
He was in the tunnel , tried to shoot the enemy while he didnt see him. With watching it with 1/4 speed you can see a very tiny part of his hand which its impossible to see on normal speed.
Second round
He knew someone is inside the tunnel , he stopped , aimed then moved forward and shot him.
Same round
They killed everyone in the tunnel , 2 were beside the crates. He aims at him from the wall , moves then shoot him.
Next round.
After getting flashed , he moved and shot an enemy immidiatly.