Shortly before the evening rush hour recently, chaos erupted at Hong Kong’s Wu Kai Sha MTR station when a wild boar stormed through the concourse. The animal, about 1.2 metres long and weighing around 40kg, knocked down an elderly man. The charging boar left a trail of blood on the station floor, injuring three other residents in a frenzied dash towards a nearby bus terminus and housing estates. “I saw it rampaging at the bus terminus while residents followed, snapping photos,” a woman working...