EE was working on the rear engine of a scraper on the night of 11/16/07. He made repeated trips up and down the scraper ladder and felt a pop in his right knee. On 2/5/08 an MRI revealed EE's right knee medial meniscus is torn and there is a tear in his posterior cruciate ligament. Arthroscopic out patient surgery to repair torn meniscus is schedule for 2/14/08.