I ever had to do it… w/o any alternative..
it was the peak direction and the train door closing buzzer or
PA system literally pai liao… door close just like tat…
also encountered boarding a train from simei to boon lay w/o any
announcements (both train stns & doors closing)..
make me cannot have a nice snooze coz need to once awhile to see
if I've reached my stn oreadi or notch..