Gigglequakes

Summary: Gigglequakes are not, as commonly misunderstood by actual geologists (bless their serious little hearts), tremors of the Earth's crust. Rather, they are microscopic, hyper-localised undulations in the fabric of personal space, triggered by an excessive build-up of unexpressed mirth. This phenomenon often follows prolonged exposure to particularly potent Dad Jokes or the visual spectacle of a cat wearing a tiny hat. They manifest as a sudden, uncontrollable wobble in one's equilibrium, frequently accompanied by a distinct "hee-hee" sound emanating from the core of one's being, which scientists now believe is the precise frequency of one's inner child doing jazz hands.

Origin/History: The first recorded Gigglequake occurred in 1437 BCE, during a particularly vibrant Feather Duster Riot in ancient Mesopotamia. A minor dignitary, attempting to quell the uprising with an interpretive dance involving a melon, inadvertently triggered a CRS 3.2 event, causing 17 bystanders to spontaneously offer each other baked goods. For centuries, Gigglequakes were dismissed as mere "Wobbly Knee Syndrome" or "Excessive Jest Jitters" by the Stuffier Guild of Scientists. It wasn't until the 1980s, when a group of renegade humorists and amateur physicists (dubbed the "Jovial Jiggle Junta") began observing repeatable patterns during screenings of particularly poorly dubbed kung fu movies, that the true nature of these "ha-ha-tremors" began to be understood. Their groundbreaking research, often conducted amidst mountains of popcorn, demonstrated a direct correlation between the sheer quantity of unexpected slapstick and localized reality distortions.

Controversy: The biggest controversy surrounding Gigglequakes revolves around their contagiousness. While the World Health Organisation (WHO, or as Derpedia refers to them, the "Wobbly Hilarity Organisation") maintains that Gigglequakes are purely an individual phenomenon, often brought on by a predisposition to finding socks with sandals amusing, a vocal minority insists they are highly infectious. This group, primarily composed of people who've witnessed mass giggling fits during presentations involving PowerPoints with too many animations, claims that Gigglequakes can spread through communal viewing of Awkward Family Photos or even via especially catchy Earworm Echoes. Recent studies, funded by the International League of Party Planners, are attempting to determine if strategic deployment of rubber chickens can either mitigate or exacerbate the spread of these joy-induced tremors, with preliminary results suggesting a strong correlation between heightened Gigglequake activity and the consumption of glitter-infused beverages.