Check out this insane red-band trailer for an interesting looking thriller called Cheap Thrills. The movie was directed by E.L. Katz and stars Ethan Embry and Pat Healy as a couple of guys who need cash and are up for doing some pretty insane stuff to get it. The movie also stars David Koechner and Sara Paxton as a rich couple who pay the two friends to participate in a crazy game of one-upmanship that quickly runs off the rails.
The movie has gotten decent reviews, and all of them that I've read say that it's extremely violent and very bloody. This is a very red-band trailer, so I suggest you don't watch it at work.