I'm actually correlating what happens with you to what I see with my husband. He'll look for something, or try to get into something that doesn't move as easily as he wants it to (oftentimes in the process of looking for something), and instead of finding out why it's doing that, or whatever, ends up forcing it and breaking something. Usually something that's mine, so I guess it doesn't matter. Kinda went off on a sideways somewhat related rant, I think. :l

But it does all stem from the same thing: getting frustrated and not staying calm when looking for something. Taking a deep breath and remembering that it's very unlikely that whatever you're looking for is absolutely missing forever is a start. I keep trying to remind him to stop, calm down, and then look... we have a fairly small apartment, there are only so many places that any one object can be. Besides, it's usually behind something that you have to move to find what you're looking for, and you'd probably already have it by now if you weren't instead getting overly upset by not having your item.