This is a clip from a Japanese comedy/prank show called Troop of One Hundred, where a 100-strong flashmob chases after random strangers. The victims’ reactions are priceless.

Translation of what the mobsters are shouting:

– For the 1st and 2nd scenes: “There’s a tsunami!” (tsunami da!)
– For the 3rd: “That’s the guy!!” (koitsu da!)
– Nothing for the 4th
– Last scene: “Watch out!” (abunai!)