Charles the Osprey's moment of infamy was brief and bittersweet. After a show early into the band's tenure as kings of instrumental math-rock in their hometown of Grand Rapids, Michigan, they found a note on a bar table written by a woman who “really enjoyed your obvious LACK of musical talent” (her emphasis). “It also really helps to play your bad music really, really loud. Give me a call sometime.” The document was featured on the popular Web site passiveaggressivenotes.com and later in a book published by the site's creators.