Today at work I spent about an hour trying to get one of those label guns to work (because it was busted) and I felt like I was SO close to figuring it out and making a breakthrough, and then my shift was up. And I got cranky about it, because I couldn't finish what I'd started.

I also get cranky about things like, for example, having to leave and go to work in the middle of solving some crazy computer problem or something.

Does anyone else get like this?