Australian Ninja Warrior fans have been left furious after a deaf competitor learned of his disqualification only after his step-son alerted him via sign language.
Paul Cashion, 48, was competing in the Channel 9 obstacle-challenge show on Sunday night when his left foot slipped into the water during the first challenge. Within milliseconds, the disqualification buzzer sounded, but due to his hearing impairment, the Queenslander was unable to hear and kept competing.

"Oh, and I just don't think he's realised," host Rebecca Maddern can be heard saying.
"It was just that touch of the water," host Ben Fordham explained.
The studio crowd watched on silently, while Cashion's wife Sarah, who is also deaf, and their daughter Grace also looked on, mouths agape, as he kept competing.