Jealousy. Often the camera angle and the angle of the front wheel in relation to frame can make it appear bent. In some cases the fork is bent but the owner refuses to believe it because it has been like that for years.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk