From another perspective -
I was in the Merchant Navy in the early 1970's, and on one occasion we were sailing past Copenhagen north bound. This was an old ship, which still had 2 100ft masts with deck floodlights about three-quarters of the way up. As the ship electrician, I'd been hoisted up in a bosun's chair to repair one of these lights. It was a lovely day, and I had a great view from up there. Suddenly I saw a rather large aircraft approaching at what appeared to me to be a VERY low level. As it got closer and bigger, with wheels and everything else hanging out, I thought to myself "This is going to be ******* close". The aircraft passed directly over my head, and there was at least a couple of hundred feet of clearance over the mast. Definitely a ar$e twitching moment though!