"Enough to disable you, at least for a few seconds." Syrlya frowns, although it's more pensive than irritated.

"You don't know anything about--" He spins his hand in the air. "Resistance to mental influence?"

It's effectively what Syrlya does--not mind control, but certainly an alteration of perception and coherency. The kind of thing someone is either naturally resistant to, or fights off purposefully.