Living in Memphis, I’m used to hearing the FedEx jets flying over at night. Some nights you hear them, some nights you don’t. Most people think it depends on cloud cover and air pressure. Then there are the rare nights where you can hear them taxiing to take off and it’s really loud. And I’m a good 15 miles from the airport. I’m not sure what weather combination causes that. People ask about it all the time on NextDoor because they were up at 3-4 a.m. and wondered what the hell that noise was.