To ever think of trying to rotate your head around will be like a death wish because it's impossible but this guy defies all odd to achieve this impossible and dangerous feat.
Martin Joe Laurello, also known by the stage names Human Owl and Bobby the Boy with the Revolving Head, was a German-American sideshow performer and biological rarity who could turn his head 120 degrees to the rear. He performed with various groups over the span of his life.
Laurello was born Martin Emmerling in Germany circa 1886. In 1921, together with a handful of other people with biological rarities from Europe, Laurello arrived in the United States. Laurello could turn his head 120 degrees. Laurello could put his head all the way around.
To accomplish this feat, he reportedly practised rotating his head for three years and also had to "dislocate various vertebrae". Being born with a slightly bent spine might have also aided Laurello in pulling off his act of flexibility.