glen campbell telling someone to shut up?

No, actually that's not what happened. I DVR'd the show. When he finished singing Rhinestone Cowboy, he asked the floor manager this exactly, "Where do I go... do I go somewhere or do I shut up?" That is exactly what he said. "Do I shut up?" He's down to earth and old school... it was a self-deprecating comment at his own expense because the man is a professional and was asking what his next cue, position or exit would be according to the planned floor show. The floor manager always waves an act on or off the stage and signals each cue. Glen knows this and was looking for specific direction at that moment.