Man on train digs nose and wipes booger on wall

He certainly left his mark.

An MRT passenger was caught on camera digging his nose with his finger and wiping his booger on the train wall.

Stomper Anonymous shared a video of the seated man speaking on the phone as he excavated his nasal passage on Oct 20.

"Disgusting man who not only had his speaker on during his whole damn conversation on the MRT as though he was in his own house, but most disgustingly, he also picked his nose and wiped his s*** on the train," said the Stomper.

The video shows that after leaving his DNA on the train cabin, he continued digging his schnozzle some more before touching the wall with his finger one more time.

Would the booger still be there?

Just last month, a US YouTuber posted a video about visiting Singapore for the first time and said he was "shocked" to see people here picking their noses openly in public.

Now we see why.