Five college students (three guys, two girls) drive an RV to a secluded cabin for a weekend of fun. Bad things happen. That’s about all I can reveal without venturing into spoiler territory.

If you’ve seen the preview trailers, you already know that the students are being watched. The watchers are in a control room with big screen TV monitors.

Richard Jenkins and Bradley Whitford play the mission control leaders. Their nonchalant, routine, ho-hum approach to their work, complete with joking, gossiping and side bets, belies the terrors that we know will ensue.

More humor comes from the stoner among the five, played by Fran Kranz. The only well-known actor among the college quintet is Chris Hemsworth who starred as Thor last year. (“Cabin” was shot in ’09 before he got the Thor role. He’ll be Thor again in the new “Avengers” movie coming in three weeks.)

In “Cabin,” as in many movies of this genre, tension builds slowly until the horror gets going. As the story proceeds to its resolution, things get really weird. Honestly, much of the weirdness is hard to describe. Just enjoy the ride.

“Cabin in the Woods” is not the scariest movie I’ve seen, nor is it the funniest. But it does a nice job of blending horror and comedy. Rated R for gore, language, weed and boobs.