Human CannonBall Stephanie Smith The length of the cannon barrel is 10metres It takes about half a second for Stephanie to come out of the barrel Almost 9000pounds of pressure is placed on her body as it is fired form the cannon, which is 10g-force... Still photos can be found here: http://public.fotki.com/Pedro23/royal_agricultural_shows/sydney_royal_easter-1/human_canonball/