Yep, been there, done that Eddie.

We had a guy once who was the manager/emcee of the club and always insisted on doing his party piece 'I Left My Heart in San Francisco'. He used to like it in the key of F. Progressively over a period of a few nights we upped the key a semitone at a time. By the end of the fourth night he damn near gave himself a hernia and never troubled us again.