Japanese Flash Mobs

I subscribe to a daily e-mail called "Web Junk of the Day". Every day I get sent an e-mail with a link to a viral video that is supposed to be fairly entertaining. They are usually funny, sometimes blogwothy, and once in a while, impossible not to post here. Today was one of those days. Here's the video, followed by the text from the Web Junk commentary:

The next time you are being pursued madly by a wild pack of Japanese folks (first, make sure you paid your bill) remember to stop and laugh because you might just be a victim of the prank show, "Troop of the One Hundred". On the program, which further pads Japanese TV's legacy of twisted genius, 100 people chase after random strangers leaving you to see their priceless and pathetic reactions. How would you react? Plans for a New York City-based version of the show were scrapped during the taping of the pilot after the first flash mob was murdered by an angry stock broker who was late for a meeting because of delays on the Long Island Railroad.

more:
Oh, and here are some translations of what is actually being said by the flash mob. They come courtesy of a Digg user who is smart enough to be bilingual, but goofy enough to be commenting on videos like this...
- For the 1st and 2nd guys, they shout: "There's a tsunami!!" (tsunami da!)
- For the 3rd guy they shout: "That's the guy!!" (koitsu da!)
- Nothing for the 4th guy
- Last scene: "Watch out!! (danger)" (abunai!)