Two friends make a bet:
“If the next foot with which I would walk is the right one, I cut you an arm with an ax!
- Deal !”
He took his ax and cut off his arm.
“Hey, but you walked with your right foot!
- No it was the left but as you are color-blind you had to confuse.
- Oh thin, that’s right!
“They say that this mistake cost you an arm!”