Laughing Gas (1914) is a Comedy film that follows although only a dental assistant, Charlie pretends to be the dentist. After receiving too much anesthesia, a patient can't stop laughing, so Charlie knocks him out with a club. Laughing Gas is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 5.5 out of 10 from 75 votes. Fans of comedy movies may also want to explore similar titles below.