Feedback when playing music while hallucinating misspelled
"butterflies".
Other bits in the same code (not part of #H9407):
All feedback messages while impaired gave "You produce <something>"
which was immediately followed by many of the instruments giving
their own "You produce <some other thing>." Change the verb for the
playing-while-impaired messages to avoid having two consecutive
"you produce" ones.
Also, multiple impairments (two or more of stunned, confused, and
hallucinating) always gave the generic "what you produce is far
from music" message. Have them sometimes ignore excess impairments
to give the message for one of those.