http://en.wikipedia.org/wiki/Niccol%C3%B2_Paganini
this is neat.
"A pervading myth about Paganini is that he sold his soul to
the Devil [much like robert johnson] in exchange for his fearsome technique, a rumor which he delighted in and may have even started himself. During a performance his eyes would roll into the back of his head while playing, revealing the whites. His swaying stance, long unruly hair and thin, gaunt stature would add to this rumor. He played so intensely that women would faint and men would break out weeping."