Amusing story of someone using my KPA

I had a guitar player fill in for me a few weeks ago. He wanted to bring his amp, and I told him he could just play through my Kemper as it's dialed in well with the house PA. He asked "What's a Kemper?".....
I told him not to worry, he'd be happy with the sound on stage.
He brought his own amp out anyways, and the band wouldn't let him plug it in. So he played all night with the Kemper, and was apparently thrilled.
He called me the next morning and said "Hey, where can I get one of those, I'd like to have a little amp like that for backup......." Some people just don't get it.