In 2012, police tasered a blind man named Colin Farmer because they mistook his guide stick for a samurai sword.
22Shiloh Baptist Church
In 1902 the congregation at the Shiloh Baptist Church in Alabama mistook a cry of "FIGHT!" for "FIRE!" and stampeded to the exits. 115 people died.
When the president of Botswana (Quett Masire) was traveling to Angola for a meeting of African heads of state, the Angolan Air Force mistook his plane for an enemy aircraft and shot it down.