On the recent Sunday, reaction on the street was mixed as members of the Philly Hang Gang shot past. Some motorists honked furiously, and a Mister Softee driver who got swarmed by 16 bikers simply stopped in surprise, waiting for the chaos to subside. A bicyclist pumping uphill toward Belmont Plateau scurried to get out of the way, and a father frantically scooped up his toddler at Hunting Park when a wheelie-ing quad charged by. But other people waved and cheered, and at one intersection a woman waiting for a bus and talking on a cellphone ran to hop on the back of a quad, catching a ride for a few blocks.