5 Awesome Facts from the Latest Episode of NCIS: Los Angeles

Chris O'Donnell comes in to save the day in Downtown, Los Angeles. Don't worry, kids, he's wearing a safety wire.

Kelly Sry, the actor who plays Jason, worked with stunt coordinator, Troy Brown, to develop the proper technique for rolling under the door. He also had a stunt double skilled in Parkour.

Parkour, or "freerunning," is an obstacle-based discipline, in which practitioners use their bodies and surroundings to cross distances, while remaining in constant motion. It first came into the public eye in the 1980s, founded in the suburbs of Paris by nine men who called themselves the "Yamakasi" (African Lingala for "Strong man, strong spirit").

Camera operator, Terence Nightingall, filmed this sequence. His hands are seen here.

The Yakuza, founded in 17th century Japan, is a transnational, organized crime syndicate. Japanese police and media call it bōryokudan ("violence group"), while the Yakuza calls itself ninkyō dantai ("chivalrous organization"). It operates internationally with an estimated 103,000 members. The Yakuza is the world's largest criminal organization.

 Watch the full episode with Sync for more behind the scenes info here!