Fantasia or the more traditional term: La3b El Baroud (The gunpowder play) is a traditional (mostly) friendly competition of horsemanship in Morocco which usually occurs during cultural festivals.
How does it work you ask?
A group of horseman wearing traditional clothing charge forth in a straight path at the same speed forming a line, then at the end of the charge they fire into the sky with muskets. The key points are that they must synchronize the movement of the horses during the charge and the most difficult part-fire the guns simultaneously so that only a single shot is heard.