The trailer for A Happening of Monumental Proportions sports an amazing ensemble cast!

The premise is short and sweet: During the course of one day, a group of students at a school in Los Angeles find themselves caught up in a plot of sex, lies and dead bodies. It stars Allison Janney, Common, Jennifer Garner, Rob Riggle, Katie Holmes, Bradley Whitford, Anders Holm and many others.

Check out the hilarious trailer!