A war blasted hulk of an apartment building in Gaza becomes a perfect stage set for parkour -- an extreme sport blending gymnastics with agility training, developed for a military obstacle course.
The parkour team CBS spoke to have survived three wars, and lived under the brutal Israeli military occupation.
The team call themselves Three Run Gaza -- for surviving three wars. And they're forced to stay, because Gaza is under a blockade.
"Parkour makes us feel free. Nothing is holding you back," says Uday.
Gaza's ruined and twisted cities an improbably perfect outlet for their exuberance. They don't see danger, but challenge -- leaps and twists from floor to debris-strewn floor.
From the roof of the parkour playground an Israeli watchtower can be seen.
"No matter how much the Israelis destroy or kill, I will still dance and have fun," says Hamza.
There is already enthusiasm from the next generation, eager for drills teaching how safety comes from practice.
Mohammad is the team's coach and its philosopher.
"We love life and hope, and peace," he says.
So what for an outsider seems death-defying, the men of Three Run Gaza see as life-affirming.
All around is sadness, they say, but in the air and in the moment, there is the sheer joy of youth.