It’s some sort of rite of passage for doomed Ruskie youths.
Crazy yes, and russian youths may have lousy future prospects, but I don’t see that as particularly russian. Kids do crazy shit all over the world. In fact your title “roof jumping” immediately brought to mind “parkour” the crazy roof jumping sport that I believe originated in france.
youtube.com/watch?v=jquXcwooV6A
And, slightly less imaginative, US kids apparently hang themselves for kicks, until they pass out (or die).
With age comes wisdom and prudence.