Happened upon a story of Paul Smith, a man with cerebral palsy who made amazing art using a typewriter:
Here's a video about his story:
If you'd rather read about him than watch the video, you can follow this link to a site called Hoax-Slayer, where the story is verified. Apparently, the artist has since died, but left behind quite an assortment of masterpieces. For more art by this artist, visit his website.