We had another of those massively loud jets go over tonight around 9pm. I could see the lights as it slowly descended, but it was too dark to make out the shape. I listened to C-5 jets on YouTube but they have more of a whine. The sound I heard tonight was much more of a jet roar, but extremely loud and undulating like the pilot was gunning throttle off and on (atmospheric effect?)
When I first heard the sound a few weeks ago I thought there was a crash of some sort, it was that alarming.