Reports of two incidents when police tasered blind men because they couldn't tell the difference between their walking sticks from a gun and sumurai sword.

Blind man Tasered by armed police who thought his walking stick was a gun
Officers Tasered the man with a 50,000 volt stun after he failed to drop the 'weapon' - http://www.independent.co.uk/news/uk...-a7600131.html

Police Taser blind man mistaking his white stick for a samurai sword - https://www.theguardian.com/uk/2012/...lind-man-stick