April 1st is April Fool’s Day – no joke. Although there is no real consensus how or where April Fool’s Day began, one thing is for certain, April Fool’s Day is just plain fun. Many people in many nations play all sorts of practical jokes and pranks on the first day of April. Some take part in the annual foolery by dishing out the standard “pull my finger” or old stand-by “whoopee cushion” trick, while others go all-out with elaborate schemes and hoaxes.

Besides individuals pranksters, some companies and websites also take part in the April Fool’s Day fun. Google, the Internet search engine, is notorious for online pranks. From the free TiSP service that provided “in-home wireless access by connecting your commode-based TiSP wireless router to one of thousands of TiSP Access Nodes via fiber-optic cable strung through your local municipal sewage lines”, and the helpful Google Romance service to the groundbreaking Google Book Search Scratch-and-Sniff, one never knows what the creative folks at Google will come up with next.

In our rushed and hurry-up world, April Fool’s Day is a gentle reminder for all of us to lighten up and not take life too seriously.

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Laughter is an audible expression (written as ha ha ha or lol etc.), or appearance of merriment or happiness, or an inward feeling of joy and pleasure (laughing on the inside). It may ensue (as a physiological reaction) from jokes, tickling, and other stimuli. Inhaling nitrous oxide can also induce laughter; other drugs, such as cannabis, can also induce episodes of strong laughter. Strong laughter can sometimes bring an onset of tears or even moderate muscular pain. Laughter is a part of human behaviour regulated by the brain. It helps humans clarify their intentions in social interaction and provides an emotional context to conversations. Laughter is used as a signal for being part of a group it signals acceptance and positive interactions with others.

Laughter is sometimes seemingly contagious, and the laughter of one person can itself provoke laughter from others as a positive feedback. An extreme case of this is the Tanganyika laughter epidemic. This may account in part for the popularity of laugh tracks in situation comedy television shows.

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