Something weird just happened. About 4:00 p.m. EDT, I was working in my yard, vacuuming up leaves. And over the loud whine of the leaf blower, I heard an even louder, kind of booming roar. So I looked up and saw nothing, though I could clearly hear the roar receding into the distance. I went back to work, and a few seconds later turned off the leaf blower to bag some leaves, and the roar came back. I looked up again, and THIS is what I saw: It's an F-15. Now, I know that they probably fly training missions, but there's no real AFB around here (Cleveland area)...and while I can't really tell how many feet up an airplane is, I can tell you that I could see it very clearly. This thing was flying at helicopter altitude. Spooky, to say the least.