Don't try this at home

OK. A question for all you pianists out there. How easy is it to play off of four staffs simultaneously? Oh, and if that weren't enough, did I mention that the two staffs are in different keys?

Yep, that's right--a bitonal piano part on four staffs. Blame Ferrucio Busoni, another member of the Liszt-Rachmaninov-Chopin "I'm writing for myself, screw anyone who comes after me" school of pianist-composers, and his gargantuan five-movement piano concerto.