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Got this weird question from one of the visitors to my website:

"How does a fly land on the ceiling. Does it make a looping, or does it suddenly turn in the air and then make a touch down (or should that be a touch up?)"

My first thoughts were: "what a stupid question". But the question was not that stupid, for I didn't have an answer. And lately the question started to nag me too. Anyone for an answer?

Thanks in advance,

Hans