5
3
This is the disturbing moment an aroused man pushed his penis up against a woman's behind on a packed train full of commuters.
The short video shows the man, who has an erection, pressed very close to a young woman as he holds the hand rail.
The man stood in the same position, with his member very close to her for several seconds while travelling on the busy metro system in Shanghai, China.
She does not appear to notice the man although she does move slightly to the side to increase the space between them on the crammed carriage.
It appears the person filming, nor others on the train, didn't alert the woman at the time and it is not known if the incident was reported to police.
The worrying clip has gone viral on Chinese social media attracting more than 3.3million views.