No, this is not another misuse of the term for a very serious neurological condition. There actually was a paranoid schizophrenic at Hyde Park this weekend. I took David to see Eric Clapton, Cheryl Crow and John Mayer and no-one recognized that someone with treatment resistant paranoid schizophrenia was amongst them - in fact, David was better behaved than many of the intimidating, smoking, view obscuring males around us.
John Mayer stole the show. Eric Clapton seems to agree because he gave John a big hug and lots of space to riff the blues during the last number. Eric is a big man and John Mayer is the new man on the block and the next big influence on Davids own guitar playing.