1987 gave Prince an after show concert in the Viennese club U4 (disco). The Viennese doorman of this club talks about Prince drumming 20 minutes in the afternoon alone, the concert (he´s showing the bootleg of the concert and a original mask used by one of the dancers) and Prince as a person ("he was very shy person, who kept himself to himself...he was really an extraordinary artist...he was one of the greatest ever" For him "the greatest because he saw him live." (translation from german)

Video in German

http://tvthek.orf.at/program/Kultur-heute/3078759/Kultur-Heute-Spezial/12535735/U4-Tuersteher-de-Beauclair-ueber-die-Begegnung-mit-Prince/12535787