The Patriot Front rally was filmed at Toronto's Cloud Gardens, a unique and award-winning half acre of green space nestled in the heart of downtown Toronto.
The bomb that Charlie had to dismantle was built within an old, steel ammunition case. The flashing light was run by remote control from the back of the set. The interior of the bomb was loaded with dry ice so that when Charlie froze it with "liquid nitrogen" (a water-based mist), it would actually appear to be freezing.
The Beaumont Bunker exterior was shot at Woodlands Park in Markham, Ontario. To safely execute the explosion, the camera angles were cheated slightly so that the bunker could be moved away from the canopy of trees and the bomb could detonate in a wide open space. This explosion was real; the SPFX Department used black powder bombs that exploded into flame balls just after "detonating cords" had been released to lift dirt and debris off the ground. This created the illusion that the pressure of the explosion had lifted the top layer of earth, allowing the flames from the bunker to escape.
The explosions in the courthouse washroom and the post office were created by using air and propane cannons. These cannons were packed with dust, debris, breakaway glass, and balsa wood slivers. When triggered, the cannons shot their "bombs" as if real explosions had occurred. SPFX Coordinator Jim McGillivary employed his 20+ years of experience to ensure that the flames would bloom beyond the windows for the most part, resulting in very little evidence of the flames in the location.
Production Notes provided courtesy of Tori Larsen.