maybe he was born hyper? his mother though 'aha, organ lessons will be good for him.' as you say - the music is probably impossible to most. i mean, thirds with one foot? whew. the great wannamaker organ at lord and taylors in philly is really neat. also, i found out we have a pretty good one (big pipes) at ursinus college. and, of course, there's one now at the kimmel center in philly.
once in california, i saw a homemade organ someone built right in the center of their home. it was wild. organ makers and organ players are usually quite eccentric and enjoy many other things besides organ playing.