Nervous laughter--or, hazards of laughing gas.
D006801:Humans; D009422:Nervous System Diseases / Q000139:chemically induced* / Q000175:diagnosis; D009609:Nitrous Oxide / Q000009:adverse effects*; D009784:Occupational Diseases / Q000139:chemically induced; D019966:Substance-Related Disorders
D009609:Nitrous Oxide