What about this one, then...

Some years ago I was doing sound at a local theatre (Davenport, Stockport) for Maynard Ferguson and the band he was touring with at the time. Late 1980s, as I recall.

We were using a pair of Bose 802s for his foldback, and the Bose 1800 amplifier I was driving them with was clipping - but he wanted it louder...! He finally accepted that, as it was clipping, it wasn't going any louder... but I had complaints from the audience that he was far too loud. Nothing I could do, because he wasn't going through the main PA, and he wouldn't allow the foldback to be turned down! There was only his trumpet going through the foldback - he didn't want the band as well!!

He did explain that he'd got so used to playing big venues with loads of power that he couldn't manage without the monitors.