Dude, my friends and I watched that on the day that I was drop dead exhasuted and oh god. v.v I wasn't aware it was so violent. And violence got me excited and I was /tired./ So I was down in my friend's basement screaming, "STAB HIM IN THE FACE!" with my friends. It's the only movie in a loooong time that I've watched with my friends that I haven't passed out in.
And that movie is so just... gah. I watched every part of it. Slightly horrified at some of the crap going on.
The Happening is hilariously bad, but you're probably talking about a different movie.
Also :< Watch different movies. Alien is very, very good if you haven't already seen it, but there are a few jump-scares; Carrie is not really horror in the classic sense, but class as hell given how it shows the horror that is high school; Predator is more of a suspense, but still really good; The Exorcist is good; Jaws is ace as hell, and not very scary -- it's a suspenseful movie with some gore; and to wind up the list, Rosemary's Baby is awesome, and again, more of a suspense.
Modern horror movies tend to go for more of the jump-scare than the slow suspense-building. Alien, for example, does have a few jump-scares, but if you keep your eye on the screen you can spot most things coming. That's what I consider a good horror movie.
Predator breaks this, since for most of the movie the Predator is invisible. Also, interestingly, the film is brightly lit -- you'll just go nuts trying to spot something moving in the undergrowth.
Anyway, I got really wordy about this but... tl;dr watch any of the movies I recommended above instead. They're much better movies, period :3
Your friends have bad taste :< Then again, I'm a nerd... Anyway, yeah, all of those are definitely worth your time, though Rosemary's Baby might be hard to find.
Wow... considering they had to pass up Alien (at the least) to get those movies... that's some really bad taste D: All of the movies I listed are probably on Netflix.
The most nutritious thing I've consumed today was a twelve-or-so ounce protein shake. Otherwise, I've eaten nothing but carbs. Damn. I think I'll go make another shake.