I too had this problem.

What I did was to get out my SKS, and fire a few rounds into the ducts
about every 4 feet. Eventually, I heard a scream, and Bruce Willis came
out. He was really ****ed, but I told him: Look man, if you are going
to film Die Hard 4 in my house, you should have asked me first. He
agreed. Then I got him a band aid to put over the spot where his left
leg used to be, and we had a beer. He's really a pretty cool guy.