Nice job ignoring my second sentence wich was the most important of my argument. (or at least it looks like you did, i don't wanna sound rude)
I am implying that those two sentences are two seperate points, because of that I only quoted the first sentence
Amellia if they suddenly teleport behind you and can successfully perform a combo then there is a 10/10 chance its a force lagger, usually the character moves forward (/backwards) during his combos (i.e. ZZZZ from Elsword), which means they can see the future and attack into the air 10-20s before you are arriving there