Brainchild of Dr Madan Katan – “The Laughter Guru” – Laughter Yoga is all about striking poses while ceaselessly chuckling like a daft bozo.

Starting with just five students in Mumbai Park in 1995, Dr Katan initially used jokes and funny stories to generate the lolz, but found he ran out of material them too quickly. However, he soon found that “the body cannot differentiate between acted and genuine laughter” (okaaay) so he went with insincere chuckles instead.

The body cannot differentiate between acted and genuine laughter

Laughter Yoga moves include “the milkshake”, in which you pretend to mix and drunk a milkshake while pretend-giggling uncontrollably (presumably you can also pretend that some of the milkshake has shot out of your nose).

You might wonder if there could be anything less relaxing than being surrounded by a roomful of people fake-laughing like maniacal simpletons, but Dr K’s disciples swear by his methods: “Life has its ups and downs,” says Chandanna Denzayll, “but Laughter Yoga has enhanced my ability to respond to all challenges!” So there you go.

Of all the bonkers yoga variants out there, Laughter Yoga is perhaps the most successful, having been covered on incredulous news reports by the BBC, CNN and NBC, amongst many others. So you could say that Dr K… has had the last laugh.

(“Booo!” “Gerroff!” etc).