Richard Hammond's Blast Lab - The Experiments - Episode 12

Lab Rats love world records. Lab Rats also like to travel back in time. So when Richard asks them to attempt to break the world javelin record, they return to Roman Britain to find a ballista, one of the most formidable siege weapons in history. The ballista was able to fire a range of projectiles including stone balls at enemy soldiers. But will it be able to break the current world javelin record?