I have a little window air conditioner unit that I have to put in the bedroom window every summer. A 40 year old house and a 5 year old air conditioner don’t play well together. Even though I do it every year, installing it is still an ordeal each time. I have to use all kinds of shims and screws and weather stripping to get it to fit correctly. I’ve almost dropped it through the open window a few times. I think the worst part is in the fall when I take it out of the window. I always manage to forget that there is some water still sloshing around in the drip pan and I get it all over my bed. :(