I haven't seen this on this forum yet, so I thought I post it over here. It seems to me my screen has a loose contact somewhere which results in some strange stuff. Sometimes when I open mij MacBook Pro screen, or adjust it's angle, the lower 2/3rd portion just hangs. When I move the screen a bit more, it goes back to normal. It started happening about a week ago, but it's getting more frequent. Here's a picture, check it out.