Hi, a chopper just flew overhead (I'm in a large city). The ground shook a bit and I felt vibrations on the floor under my feet as it flew over. It happened last week as well.
Can any of you rotorheads explain how/why this happens? I can't find anything in google because it's all mobbed with those "strange reports" of sounds that the internet loves!
Here's an unrelated bit of eye candy for ya in return, it's a concept craft (3D visualization)
