the kids saw the [pig]s comming down the street, and all formed a critical mass and pushed the dumpster into the middle of the street and set in on fire
a collective group of people who join together for a greater cause
"the kids saw the [pig]s comming down the street, and all formed a critical mass and pushed the dumpster into the middle of the street and set in on fire" What is the definition of "critical mass"?