Bomb down the hill at high speed on a tiny bike then ride the train back up the mountain for another go...
"We're not political. We don't want to subvert your dominant paradigm," Archibald says. "We just want to have a good time..."
Last November, after being spotted at a Critical Mass with a sign reading "Bomb the Zoo, not Iraq," several Zoobombers were profiled as potential terrorists by the FBI Joint Terrorism Task Force!
"We're a 'suspicious group,' post 9/11," Archibald explains, "because we ride around at night and encourage other people to have fun."