The crazy guys at the UK branch of Dawn of War II publisher THQ--along with Dawn of War creators Games Workshop and the aptly-named engineers at Tanks-A-Lot--built a full-scale version of a Rhino, the Space Marine APC unit.
Then they turned it loose on a family car, Top Gear-style.
BOOM video 1476
Keep in mind the beta is just a beta of the multiplayer part of the game.
You should definitely check the beta, the game is not everyone's cup of tea.