http://www.huffingtonpost.com/2014/0...n_5273609.html
The thought here appears to be that the brain injury unmasked a latent geometry ability in this person (very rare outcome of course). Thus far there are only about 45 cases in which a brain injury resulted in a savant ability.In 2002, two men savagely attacked Jason Padgett outside a karaoke bar, leaving him with a severe concussion and post-traumatic stress disorder. But the incident also turned Padgett into a mathematical genius who sees the world through the lens of geometry.
Padgett, a furniture salesman from Tacoma, Washington, who had very little interest in academics, developed the ability to visualize complex mathematical objects and physics concepts intuitively.