Rainn Wilson and Elijah Wood fight kid zombies in 'Cooties' trailer (seriously)

As if the fourth grade wasn't scary, try adding a healthy dose of a zombie epidemic that only effects the prepubescent. That's the premise of Cooties the new horror comedy starring Rainn Wilson and Elijah Wood, which pits a group of teachers against their zombified former students, who ended up that way because they ate some bad chicken nuggets (we KNEW cafeteria food was poison!).

Cooties hits theaters and goes on demand Sept. 18.