Put this clip at the start of a scene change, then follow it with a bell ding sound effect for the departure beat, and save the dramatic dun dun dun for right after someone realises they boarded the wrong train.
About this sound
This is a three-second station announcement in the formal PA style of CP Comboios de Portugal, heard with a clean, slightly distant tone. It gives a listener the grounded, in-transit feeling of waiting on a platform for official news, which can turn an ordinary moment awkward or unexpectedly funny.