Personally I encountered this, it was not an ang moh couple, but a local with the baby pram stuck on the gap & the door was closing fast, no one reacted...I pressed the emergeny butteon to stop the train, risking a $5,000 fine...fortunately there was an off duty SMRT train officer near to the door, witness it & he called control from there using the train intercom.
It was the NEL...