For some passengers, the scariest thing that could happen when we fly would be to get sucked out of the window of the plane. So, it stands to reason that seeing a hole in the airplane window would scare those people quite a bit. Afterall, aviation is serious business and there’s no way the FAA would allow anything to compromise safety. Right? Fortunately, the FAA confirmed that the small hole located at the bottom of the window is safe. But, what’s it for?