I had something like this happen to me the other day. I was over Texas, I think, and a massive drop of the scenery appeared in the distance. I continued along my flightpath and it got closer. When I got there, I saw it to be in a lake, with the water dropping away for hundreds of feet like a huge piece of glass had been put there and all the water drained out. There were several spires out in the lake that looked like those spires out in the Arizona desert which you oftentimes see in beer commercials and music videos. I eventually flew past it; it did not follow me around.
The thing is I have never seen this before until I discovered Mike Stone's Hangar and downloaded a bunch of his self-installing planes. I noticed that my computer ran slower and that things like the landing gear would blink and flutter, and I could look completely through the engines of some jetliners at a certain angle but not at other angles. Anybody ever seen this with Mike Stone's airplanes?


