I have been freaked out alot but later you learn that you hear some sort of bird call when there is a chameleon in the area and then before they attack you hear loud pounding noises so they end up becoming easy, but it is a one hit KO in later difficulties (so far i have played on hard, that is what i have started on, and now i am starting Superhuman)
The grims are crazy scary for me, especially when you walk into the theater in chicago and you see like 50 of them in the audience