Intent on escaping (and pissing himself at least a little), the 34-year-old criminal pushed the 60-year-old judge out of the way and ran down a hallway. Moore wouldn't have it: Undeterred, he got up, chased after the sprinting criminal and rugby-tackled him to the floor seconds before he got away. It's like Moore momentarily forgot he wasn't living in a Judge Dredd comic, where physically subduing criminals in the most violent way possible would be part of his job description.
In England, this is a mandatory part of judge training.
And if you think there isn't a big chance Reid would have gotten very far: The guy had pulled the exact same stunt two years earlier and successfully escaped a court building. Apparently, in Britain the only way to make up for shoddy handcuffs and ineffective guards is having the most badass judges ever.
"I'm here to rugby-tackle crime."