Newsgroup discussion mentioned that it was possible to open the castle
drawbridge with musical notes even while confused. There was already
some handling for confusion: improvisation treats magical instruments
as their mundane equivalents. This takes if farther: when stunned
or confused or hallucinating you'll always improvise instead of being
given a chance to choose notes. Being stunned now behaves the same
as being confused in regards to magical instruments (possibly/probably
it should prevent playing music altogether). Hallucination gives
different feedback at start but still allows magical playing.