I have to agree, not a fan of Billy Joel but this was truly a far more professional attitude than just seeing divas like Axel Rose acting like a little bitch for 5 seconds and then leaving the stage.
Actually he was mad because the house lights had been turned on. While doing his Russia tour, people having "too much fun" at his concerts of evil Western rock decadence were escorted out to places unknown and basically no one going to the concerts would appear to enjoy the show if the lights were on because they feared they were being watched by secret police. Why he chose to take it out on his bandmates I have no clue, but that's the story behind this.