I heard about this yesterday from a Chinese friend, and it looks like The Guardian was among the first foreign media to pick it up:
A teenage boy has been killed and dozens of people were injured when they were thrown off an escalator that suddenly changed direction in a busy Beijing subway station.
Witnesses described a strange grinding noise from the shifting gears and then a tumult in which riders at the top of the escalator fell to the bottom in less than two seconds.
The boy and the other riders were thrown down the metal stairs and into a heap at the bottom. Twenty-eight people were taken to hospital, including the dead boy's father and sister. Two were described as being in a serious condition.
Commuters were horrified at the safety failure. "This is unbelievable. This is the most basic thing and they can't even do it well. I am very disappointed by Beijing's public transportation system," said Olivia Li, a student at Renmin University who often takes Line 4.