I have been told that my facial expressions while playing are quite pronounced, and numerous audience members have asked me what in the world I am saying to myself as I play. In the act of practicing or performing, I am totally unconscious of any of this: I had to be asked and told, and to watch myself on video, to realise it was happening. It really does look as if I'm having a lively conversation with myself. Curtis Lindsay, pianist: blog at Quora.com. 11 June 2015 At a piano recital in a London concert hall, MS, seated on the right side of the auditorium, fairly far forward, was able to view the face and upper body of the pianist across the top of the Steinway concert grand piano. The performer, as usual, was seated right side-on to the audience. The performance, of a difficult programme that included works from the 18th and 20th centuries, was exceptional, technically near-perfect, emotionally expressive, with brilliance in tonality and colour. However, it was marred by the pianist's florid, distracting facial movements, evident throughout the performance, even during a closing encore. Here, we consider the nosology of these performance-associated extraneous facial movements. The Facial Mannerisms: 'Face-Making' During the performance the pianist displayed brief pursing movements of the lips, intermittent furrowing of the brow, forceful lateral and twisting movements of mouth and face, snarling expressions, a minor degree of tongue protrusion, darting eye movements to both sides, head retraction, elevation of the shoulders, forceful intakes of breath and, less frequently, a maintained posture of leaning backward away from the keyboard. The pianist's legs seemed unaffected. There were no associated vocalisations. The facial movements appeared during every piece of music, commencing at the onset of each piece, but not evident before or immediately after the performance. During the performer's walk across the stage towards the pianoforte, when standing to receive tumultuous applause, or when leaving the stage, there were no facial mannerisms or inappropriate gestures. The pianist was an early career professional, already much admired. An internet search for biographical details revealed no evidence of declared neuropsychiatric disorder.