One of China’s tallest skyscrapers was evacuated on Tuesday after it began to shake, sending panicked shoppers scampering to safety. The near 300 meter high SEG Plaza in Shenzhen inexplicably began to shake at around 1pm, prompting an evacuation of people inside while pedestrians looked on open-mouthed. Officials are investigating what caused the tower to wobble, according to a post on the Twitter-like Weibo platform.