The full story including pictures is in Pallud's book Panzers in Normandy, Then and Now. Looking at the photos and the account of the action, Wittman had obviously spend too much time in Russia. He and the three other Tigers of his platoon were 'charging' across a flat open landscape against at least a squadron of Canadian Shermas, including Fireflys. Eyewitness accounts (other than the one linked here) say at least 3 to 5 Shermans were firing on Wittmann's tank.
Unlike in Russia where crews often got a minimum of training and were using the T 34/76, handicapped with a 2 man turret and a gun that could not penetrate a Tiger I, the Canadians had 1 tank in 4 Fireflys that were more than capable of drilling a Tiger at considerable range.
Wittmann's over-confidence was the end of him. Maybe he began to believe his own legend....

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Truth is stranger than bullshit!