Sir Robert Wetfart was the normal human founder of Wetfart Memorial Hospital in Little Hillbillytown. Wetfart was not his actual surname, but a title given to him for a gas problem. When asked the motto for his hospital, he said "E pluribus--" but before he could finish and say "unum." he farted and asked "Who let one?"
Since that time the motto has been written as "E Pluribus -- Who let one?"