Pandemonium erupted at Penn Station Friday after Amtrak police used a stun gun on an unruly man — sending scared riders scrambling for safety.

The transit hub was unusually crowded at rush hour thanks to an NJ Transit train that stalled in a tunnel earlier, causing massive delays to kick off the holiday weekend.

Cops confronted a man and subdued him with a stun gun around 6:30 p.m., sparking a stampede of frightened travelers who feared that a shooting had taken place.

http://www.nydailynews.com/new-york/stampeding-mob-flees-penn-station-amtrak-cops-taser-man-article-1.3056434