This is possibly the scariest zombie prank we've seen

Horror: The woman is clearly in enormous distress
Horror: The woman is clearly in enormous distress

This is one of the cruelest pranks we've ever seen.

This helpless woman boarded the underground when the lights on the train began to flicker. 

The driver is heard over the intercom telling the passengers they are experiencing technical problems. He is then attacked by subjects unseen. 

And out of nowhere dozens of truly awful-looking 'zombies' appear and they're trying to gain access to the train. One of the specimens gets in and begins dragging herself (?) towards the victim before the doors open and she conveniently escapes. 

Unbeknownst to her she's the subject of a TV prank conceived by a popular Brazilian show. 

This happens several times with good effect.

But it's a step too far, we think... Skip to around 1.30 for the good stuff.