[Magnatron]

My father did that once. Long time ago in his twin engine Beechcraft. I was in the back seat.

[woodbutcher1963]

Pilots have been flying UNDER the Mackinac Bridge ever since it was built.

I have heard stories like this for 30 years.

[WhoisAlanGreenspan?]

A friend of mine flying cargo over the desert many years ago, decided to break the 3:00 am boredom by doing a loop in a 727. Ground controller jumped right after him, hey are you all right? Watch your altitude.

Laughing he responded, straight and level here, everything's fine.