Well, I said it was a bad idea, so I guess that's what I get.
Slenderman mask/suit combo does not work as a disguise, even against the hiveminds.
Those fuckers called reinforcements, I knocked three of the sorry sons of bitches out cold, they called their boss, and I had to run.
Mild headache. I'm getting used to them, honestly.
That fact alone would have worried me a year ago.