At 3:05 no spotted enemy at stinger house but he leave bike and knows exactly where is.
At 1:49 no enemy spotted and he knows where is.
At 7:55 he kills that enemy and goes to E but suddenly turn around to an no spotted enemy
At 8:09 no spotted enemy and he knows he is coming from left side.
At 28:52 he goes to shoot front enemy and suddenly aimsnap to right side.