If I know well he didn't have any problem. :-) There are very strange methods to reach the nearest tower in the Czech sandstones. There is a scale to measure the difficulty of this method. It is not unusual to make a "human bridge" between two towers and climbers use each other for going.
not only they're good climbers but I know they're amazing explorers/cavers too.
Krubera, the deepest known karst system in the world ( -20080 meters!! ) was actually explored/mapped by an international expedition guided by Czech cavers.
To climb on Czech sandstones is a kind of crazyness because when you climb the routes these are almost soloing. There are few anchors in the wall and it's forbidden to use metal hardware as nuts, friends, cams, etc.
"As an adolescent I aspired to lasting fame, I craved factual certainty, and I thirsted for a meaningful vision of human life - so I became a scientist. This is like becoming an archbishop so you can meet girls."