escalator malfunction:滚梯故障

stampede:踩踏

bridge collapse(cave-in):桥梁坍塌

power failure/outage:断电

bullet train breakdown:高铁故障

mine disaster:矿难

massive pileup:大规模连环相撞

tourist bus overturn:观光车翻车

weibo hack attack:微博黑客攻击