For an hour and a half last night, thousands of unruly cyclists had the run of some of Manhattan's most famous streets.
At each intersection, a few bikers would stop and block traffic, infuriating cabbies and other motorists.
Whistling, hooting and hollering, the pedalers turned the car-free streets into their own private playgrounds.
"It was fantastic," said Bismarck Decastillo, 39, a thrift store worker from the south Bronx. "The people protested, with freedom. When people can get together, we can do something."
"Whose streets? Our streets," was their slogan, repeated endlessly through the night.
Why didn't someone just sprinkle a box of tacks (pins/nails) on the road.....woulda soon stopped them 
