Over 200 young people turned up at a house party uninvited in Co. Kildare on Monday evening.
A 17-year-old girl posted on social media she was inviting friends to her house in Leixlip.
It was shared and went viral.
The young girl's Dad has explained what led to everything getting out of hand.
He said he initially had no issue with her inviting five or 6 friends over as he was away for the night.
Kevin says "She made a private story on Snapchat, did a little invite with all the names on it."
"Someone screenshot it, put it on a public story, and then it just went viral. People turned up from everywhere!"
Gardai did eventually show up to bust the house party.
Three teenagers were arrested for public order offences.