John Michael Callahan (February 5, 1951 – July 24, 2010) was an American cartoonist, artist, and musician.

[1] Following this, Callahan became a cartoonist, drawing by clutching a pen between both hands, having regained partial use of his upper body.

Callahan's cartoons dealt with subjects often considered taboo, including disabilities and disease.

His black humor may be exemplified by the title of his "quasi-memoir", Will the Real John Callahan Please Stand Up?

From 1983 until his death 27 years later, Callahan's work appeared in the Portland newspaper Willamette Week.

Friends said Callahan realized that his cartooning was a form of emotional venting, which led him to pursue a master's degree in counseling at Portland State University.

[4] In 2005, Dutch filmmaker Simone de Vries directed a documentary about Callahan titled Raak me waar ik voelen kan (English: Touch Me Where I Can Feel).

A Dutch film crew recorded the studio sessions in which Callahan played a simplified piano version of "Roll Away the Day".

In his book, Callahan said, "I can imagine myself sitting on that bench and thinking Boy, this will be called child molestation twenty years from now.