Door Knockers

Unsuspecting homeowners get a knock on the door that they'll never forget. Before they know it, a crew of contractors is walking into the house, bringing out the power tools and creating amazing room transformations right on the spot. "Door Knockers" is a new spin on the Crashers franchise, only instead of ambushing at the home improvement store, DIY Network does it right at the front stoop of the house.
(Source: DIY Network)