I Love to Laugh Mr. Wigg, is said to float because of an excess of "laughing gas", although it is clear that the term is not used in the chemical sense. So-called "laughing gas" (nitrous oxide) was one of the earliest effective anaesthetics developed in the Nineteenth century. it was popularised by dentists, for pain-free tooth extractions, as well as by showground novelty booths. Customers at the booth would be gassed and, as they were recovering from the drugged sleep they often felt euphoric and giggly. Hence the name. A famous 1931 British comedy sketch starring Cicely Courtneidge, called "Laughing Gas", was based on
Leave 'Em Laughing to get his tooth pulled. The dentist leaves and Ollie demonstrates how Stan should sit and not be afraid. Meanwhile, the dentist tells one of his partners that he should go to the guy who is sitting in the chair and pull his tooth out. He ended up pulling Ollie's tooth. When Stan is back in the chair, he knocks over a gas cartridge which makes everyone laugh. Stan and Ollie leave the office and go to their car, still laughing their heads off from the gas. "Leave 'Em Laughing" was remade by The Three Stooges in 1943, as ""I