preparation both technical and organizational. that. perfect moment for me go out of my life yeah it's crazy because we're working very odd you know just to obtain one shot and we have five gunmen are warning and jumping on the water we have some stuff and you frothing on the happiness ok but two up in that lot of bad moment as well then you have to do what you have to be ready to pay the price. accidents are part of that process. jiri don't know has been chilling extreme sports since the one nine hundred eighty s. . technological developments have changed the way he works he started off using a heavy and unwieldy thirty five millimeter film camera then came digging cams which helped him get closer to the athletes and nowadays he often invents is own