The horrific injury put him 10 months on the sidelines .
Mitch Hahn of the Bulldogs badly hyperextended his left knee forwards after landing awkwardly and grimaced on the ground with his hands around his knee .
The horrific injury put Mitch Hahn 10 months on the sidelines .
Mitch Hahn of the Bulldogs badly hyperextended his left knee forwards after landing awkwardly and grimaced on the ground with his hands around his knee .