PRACTICAL JOKERS???

The incident of the mystery airship was very talked and discuted by lots of people. One of the problably ways to solve this mystery is saying that the airship was maked by a joker. In the 18's and 19's it practical jokers and all type of jokes were very common. One of the posibilities, is that a practical joker that just wanna have fun, constructed with paper or with some else type of material and put it to fly like a glove and all people saw that. How you can se in the picture, there are perrsons trying to make that airship to fly, but making an airship, and put it to fly is very difficult. Also, something important, is that if the man that report two mans pedalling in a blak ship is correct, this would be almos impossible, because in any part of the world land this ship, so if they were practical jokers, where does the ship had gone?
This is a mystery that is very difficult to prove and that's why it is a mystery, because anyone know wath it is.