Well, as you've seen, I don't know how to make good zone events. However, if you want to fakekill the building beforehand, here's what you do:
Name every single brick that you want to break the same thing. I'll just say "building".
Make a button of some sort. Set these events:
OnActivate | NAMED BRICK | FakeKill [0] [0] [0] [?]
building
Make "?" the number of seconds you want the bricks to remain physics bricks. Basically, how long you want them to stay able to break or broken.
Then, all you need to do is press the button and drive your vehicle into it.