Bumping into a plane (on foot) is just as difficult as it sounds, you have to be pretty spacey. I found an area in the hangar where the phone signal was strong. I was talking on my cellphone while walking around. The plane’s wing, just a few arc-seconds above my of sight, whacked my forehead. Fortunately it was a small plane. The plane’s okay, and so am I. … And I almost did it again, a few hours later.