Only if your moving around and he pops up somewhere close to you and it gets loud. That, freaks me and almost deafened me cuz' the volume was all the way up.
Pretend to die and stay alive. To you, you are still alive. To them you are dead. Get your sword and kill them. Then they actually die and you stay alive.
The first time I saw Slender on youtube, I almost had a heart attack. Also the probably 10th time I saw Slender, I did the same. I never wanna see Slender again.