Planet 51

Get your self into a car, and while in the “Suburb” section of the game approach a few houses that have the white picket fences in the front yard. Quickly drive into and destroy all fence pieces on about 2-3 houses. This is more than enough for thirty objects, and really only takes about 25-35 seconds to unlock the achievement. If for some reason you mess up, simply drive a bit away and return to the fences respawned.