totally random, but just some things that puzzle me

[rodneyscat]

Every once in a while, when I'm rummaging around at YouTube, I go searching for clips from those Saw movies. I've tried watching some of them that are an actual gruesome scene, not just a trailer. I can watch the trailers, no problem. I figure; it's a small window, crappy quality, I can put the sound down, I'm right here in my living-room, some distance from the screen, with all kinds of reassuring stuff surrounding it, in broad daylight, I know it's not real etc. A couple of seconds into whichever clip I pick, the moment I'm guessing something terrible is about to happen, I click away.

Now what puzzles me is:

1) How can anyone stand to watch a whole movie of this on the big screen?

2) Why do I keep trying to watch these clips?