Jason Becker - Not Dead Yet
http://www.imdb.com/title/tt2120779/

Unbelievable optimistic doc about someone who was so promising that could have surpased Yngwie Malmsteen's playing skills - if there wasn't an illness that happened.
This is not an ordinary pathetic stuff but a real story about a person who is for music something as Hawking is for the astronomy.
You may watch it for free (within a 30days trial) here:
http://www.lovefilm.com/film/Jason-B…ad-Yet/189869/

Make sure you read first how exactly the rental there works:
http://www.lovefilm.com/how-it-works/
Physical discs can be rented only if your address is within the United Kingdom (including Northern Ireland and BFPO addresses); this excludes PO Box addresses. This is not the case for streams.