In 1901, aviation pioneer Wilbur Wright made the infamous quote, "Man will not fly for 50 years." Wilbur Wright said this right after an aviation attempt made by the Wright Brothers failed. Two years later in 1903, the Wright Brothers did indeed fly in their first successful flight, the first manned airplane flight ever made. Looking back at his prediction in 1908, he stated 'Ever since, I have distrusted myself and avoided all predictions.'
Aero Club of France [speech] 5 November 1908