Brad Mehldau once stopped during his solo (Rossy & Grenadier played on), and made gestures of hitting the photographer... (that was at a concert around 2001, I think).
ubu
Let me pose this question, which I once heard Gerry Mulligan raise when he was asked about audiences and their behavior (he was referring to talking in the audience while the artist played) .... "Would people do that to Horowitz?" So, are jazz musicians any lesser musical artists, or do they fall into the "entertainer" category, and thus subject to intrusions into their artistic experience?
They weren't playing. Just putting the charts on the music stands.