My grandma was deaf in her right ear.
I was about 8 or 9, and had never been told this (or at least didn't remember ever being told it). We were waiting to cross the road, looking both ways. She was satisfied that it was safe, but I could see the fast car approaching and warned her to stop.

Unfortunately I was standing to her right, and she didn't hear me.

Even more unfortunately, I then instinctively grabbed her arm and stopped her, thereby denying myself and passers-by the hilarious spectacle of her being upended by a speeding car, doing a somersault in the air and landing on the road behind it with a massive splat, before being flattened by the next car.

She lived another 20 years after that, and every day was at the cost of what would have been a fucking hilarious accident.
(Plague Hedgehog 'posting crap', Sun 5 Oct 2014, 18:24, Reply)