It was supposed to be a fun Saturday night out with an old friend visiting from the UK.
But things turned out quite differently for Ms Uma Mageswari when she caught a man secretly filming her on a North-East Line (NEL) MRT train.
She had boarded the train at Outram MRT station on the evening of May 13 and was heading towards Harbourfront MRT station.
Ms Uma said she noticed a man sitting in front of her but didn't think much of it and continued scrolling through her music playlist on her phone.
She looked up again and saw the same man holding his phone up, and seemed to be pointing the camera at her.
She started to suspect that she was being filmed and while she felt herself turning mad, she said she forced herself to keep calm and did the same thing to him - she whipped out her phone and started filming the man too.
She then posted the video on her Facebook page a few days later with an account of what happened and even some details of the man as well.
It didn't take long before it went viral in Singapore. At the time of publishing, the video has garnered over one million views.