British children leaped on a new World record as one million jumping children successfully caused an earthquake. Thousands of schools were asked to send children outside at 11 a.m. last Friday to jump up and down for a minute in hopes of creating a measurable quake.

The Giant Jump event was held to mark the launch of the government’s Science Year, and organizers said it was a success. Scientists said a million children with an average weight of 110 pounds jumping 20 times in a minute would release two billion joules of energy and trigger the equivalent of an earthquake measuring three on the Richter scale.

Children were surveyed before the event to make predictions on the outcome. Perhaps the most accurate prediction came from one of the jumpers, who said, “There will be lots of hospital visits from people with sprained ankles.”