Watch Laughology (2009) Official Trailer

This infectious documentary explores the power of laughter. It's a matter of particular importance for director Albert Nerenberg (also a neuroscientist), who became intrigued by the subject after a devastating personal tragedy. Parsing the addictive and curative qualities of laughter, LAUGHOLOGY wouldn't be complete without an appearance by Doug Collins -- "the man with the most contagious laugh in the world."