The Pony Boy (1895 – 1970)
His real name was Robert Huddleston. He was born with a very advanced form of ongenital genu recurvatum, which is a deformity of the knee. He lived his entire life walking around on all fours. He was actually very successful as a farmhand and carpenter. He only went to the circus lifestyle after he did one circus just for fun. He then spent 36 years of his life in the industry.