Hundreds of pyjama-clad fighters gathered at Chater Garden in Central yesterday for a massive pillow fight. An afternoon of sun welcomed the 400 or so participants at the annual event, which takes place around the world on the first Saturday of April. "It was perfect pillow-carnage weather," said Tom Grundy, 30, who has organised the event for the past three years. "It's quite refreshing seeing people get together for a reason that's not a protest. It's just so easy to grab a pillow and join in." The police were notified of the event the day before. No official approval was given. "It's spontaneous," Grundy said. No one was injured during the hour-long fight and everyone helped clean up. Many people came dressed in costumes. "So there was a Winnie-the-Pooh fighting Spiderman, which was pretty funny to see," Grundy said.