A bizarre craze which has been sweeping the United States and Europe for several months is expected to hit Dublin in the coming days.
"Flash mobs" have been springing up in cities on both continents this summer and one is planned for Dublin this weekend.
The phenomenon involves organised gangs of people gathering quickly in the same place, engaging in some bizarre act and then dispersing within a couple of minutes.
In Rome, hundreds of people recently turned up a music store, demanded non-existent CDs, broke into spontaneous applause and then disappeared.
A crowd of 200 people also gathered at a London furniture store recently and started praising the sofas.
The craze started in the United States, where last night, a "flash mob" descended on a Toys R Us store in New York to worship a huge model dinosaur. The mobs are organised over the internet and with mobile phones.