This thread reminds me years ago of installing a window A/C in a former girlfreinds house on the north side of Chicago. She lived in one of those mid rises near Belmont Harbor. She was on the 14th Floor. We put in a 10,000 BTU unit and it cooled the place pretty good. It was one of those set it on the window sill, lower the window into a channel and then extend the sides. Easy.
Well later in the summer she said that she needed to buy a new window a/c. I asked her what happened to the old one? She said she was cleaning the window above the a/c unit, and it FELL OUT OF THE WINDOW! And not into the apartment, either! Fortunately, there was a car park below. I asked her what she did, and she said that there is no way in heck that the a/c unit would be any good, so she just closed the window and acted like nothing happened at all!
A few days later I got up there and looked in the parking lot below and sure enough, there was a rather deep hole in the asphalt of the parking lot pretty close to under her window. Thank goodness nobody got hurt. But in mentioning this to other people later on, I found out that this was not that uncommon of an occurance!
"Any You'd Better Be Good, missy, or someone may drop an A/C unit on you too!"