[quote=Valeric]
I don't really understand this...
[/quote]

It meant, Vologhn is warned that a guard got his hand stuck on his web and is tugging at it as he tried to pry the hand off. Now, if the guard's smart enough to suspect something, then he'd knew that the cause of whatever causing his hand to be stuck on thin air has to be someone that passed earlier, as it can't be one of their own, then it must be an outsider's work, right? If Vologhn thought that, then they're on a timer until the guard realized that, shouted the alarm and re-enact Viva La Revolution closing.