You will get used to it when you watch it like 5 times. Which one did you watch because there is more than one version of that?
Is it the one that was like little over 2 minutes long with excellent use of SFM? That one is my favorite version.
I watched shriek when I was 5 he scared the shit out of me. I was screaming in the movie theater like a maniac. I got traumatized for about a month and I watched it again when I was 7 and then the donkey scared the shit out of me. Since then I never watched shriek again ;-;