Who You Calling an Idiom?

I know I promised job stories but this was just too good. Today I saw a man wearing dark sunglasses, carrying a white cane, leading a woman who was also wearing dark sunglasses and also carrying a white cane. They walked side-by-side, taking up all of the south side of the sidewalk, not stopping for traffic, not looking anyone in the eye, not a care in the world. I have literally seen the blind leading the blind, and they were heading west on Mont-Royal.