The Mist 2007

The Sci-fi Horror film written and directed by Frank Darabont. Based on Stephen Kings Novella of the same name. 

Starring: Thomas Jane, Marcy Gay Harden, Laurie Holden, Andre Braugher, Tobey Jones, William Sadler, Jeffery DeMunn, Nathan Gamble and Sam Witwer.

When David and his son Billy leave with their neighbor to the local grocery story a terrifying Mist traps them in with a shocking fate.