There once was a luthier named Oppornockity who sold his instruments pretuned by his own hand and they came out perfectly. A performer had been playing for a while and had a major gig coming up, so he changed his guitar to a fresh set of strings and could not get any of the strings to come into the correct pitch. When he took the instrument back to Oppornockity, he was told that













"Sorry, Oppornockity only tunes once."

Where's my hat?