In this instance, you have a vagabond teleporting into the area. Sym sees him right off and that's all fine, until what happens during the ensuing shootout. Sym is looking out the window and instead of moving forward into the window, he strafes toward the other window, noobish move but nothing, until you see where his crosshairs are for the entire thing. It looks to me like a walltrace to the point where he shoots before he even has a vantage on the guy. Everyone has shot at boxes where they saw someone disappear but this is something special, 2 people in motion and a minimap that isn't tracking the movement with a perfect walltrace.