What does an artist,band, performer "owe" me when I buy a ticket to see them perform? Their best effort. I would be greatly dissappointed to get anything other than that. Oh everyone has an off night, doesn't feel well, the weather doesn't co-operate, equipment fails but I still know when the peformers gave it their best. I've been to shows and have been greatly dissappointed, missed lyrics, stoned performers, short show, rushed set, indifference toward to the audience... I pay to see them perform and entertain me so that is my expectation.