John Edward Szeles (September 9, 1958 – February 22, 2022), better known by the stage name The Amazing Johnathan, was an American comedian and magician.

Self-described as the "Freddy Krueger of Comedy",[2] Szeles performed wearing his ever-present headband, and his shows frequently used gore; for example, pretending to suck on his own hanging eyeball, cutting his wrists, and skewering his own tongue.

His only credited performance as an actor was "The Obligatory Holiday Episode" of The Weird Al Show (playing the part of Uncle Johnathan).

He made several appearances on Late Night with David Letterman, a record 24 appearances on Fox's Comic Strip Live, and had several specials on Comedy Central including Comedy Central Presents, Lounge Lizards, and more recently his own one-hour special entitled Wrong on Every Level.

[8] In 2011, Szeles was performing regular shows in Las Vegas at the Harmon Theater while also taking select dates at venues across the United States and in Australia.

[10] The performer's website identified the condition as cardiomyopathy and went on to assert that, due to a combination of weight loss and blood thinners, he was doing well.

[12][13] However, his heart condition worsened and Szeles announced that he would effectively retire, performing a final show in Toledo, Ohio, for the general public, and then for members of the Magic Castle on June 30 and July 1, 2014.