Japanese TV shows are fantastic. For some reason they really make me laugh. They just seem to be able to get away with things over there which we simply could not do in this country without getting a huge law suit shortly after. Best of all, the contestants (or in this case the general public that are being pranked) always see the funny side when the prank is over.
This video uses large crowds of people to terrorise the unsuspecting. The first prank sees a huge crowd of people running down a narrow alley, normally resulting in the person being pranked running away from them in terror (apart from the first elderly man who seems completely oblivious to it all!). The second sees someone being surrounded and then thrown into the air. The final prank involves everyone slowly walking past the passer by, and then all hitting the deck at the same time, once again terrifying the prankee! Excellent.