Mozarts motor behaviour In addition to uttered vulgar platitudes, 34 Mozarts frequent facial grimaces, inadvertent repetitive movements of hands and feet. For example, she described Mozarts x0201c;cattyx0201d; behaviour during an improvisation on Non pix000f9; andrai (from Act I of Figaro). First published as "Lass froh uns sein" ("Let us be joyful"). Such an insulated upbringing would further have prejudiced his emotional development while his preoccupation with music probably retarded the general growth of some of his other talents, Mozart made excessive use of obscene words, primarily focusing on defecation and anal vulgarities, suggesting the presence of coprographia.