Well, admittedly, it’s not too big a twist.

Essentially, the girl realises that she is not alone, and the discovery that she isn’t is hilarious.

The video was shared by Adam (@AdamBroud) of his friend Stevie.

It sees the young woman gleefully record herself while making the most out of her empty train – as you do – by loudly singing a song she made up about being on the train alone.

The tweet has 95k likes and has been shared 25k times.