With his slicked-back hair, blue jeans and leather jacket, actor Henry Winkler turned the character of Arthur 'The Fonz' Fonzarelli into a Seventies icon.

Millions of teenage Happy Days fans watched in envy as he sat astride his gleaming Harley-Davidson and, with just one wink, had girls flocking around him.
But the reality was rather different. The star couldn't actually ride the bike because his co-ordination was so poor - one symptom of dyslexia, a condition that had crippled him since childhood yet remained undiagnosed until he was 35.

Instead, the Harley was mounted on a piece of wood on wheels and pulled along for action scenes.



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