The ones we visited in Paris have 50cm thick solid steel doors and submarine hatch style wheels to wind them shut. I would anticipate that even just the air pr

The ones we visited in Paris have 50cm thick solid steel doors and submarine hatch style wheels to wind them shut. I would anticipate that even just the air pressure that is expelled during a surge is probably enough to cause serious damage to people. On the scale of G-cans, it's hard to know if it would be more dangerous or less dangerous..