It's an S-Gate that wasn't conquered and monsters come out from it.
There's a 10min delay, but we didn't see Jinwoo watching TV and go "This is bad, I should help."Originally Posted by Kraco
We see a cool pose on top of a building, then he stands up and thinks "It's time - Exchange."
Thus far we haven't been shown any indication that his soldiers communicate telepathically to him. Jinwoo had to guess at events when his soldiers were being killed off in the Castle level.
So, currently neither scenarios make complete sense from a continuity perspective.