Man cuts off own leg with a pocket knife

k, i'm having trouble here
'sawed' and 'pocket knife' don't really go together

if i'm guessing (which this article is making me do) he cut through tendons & cartilage attaching the patella to the tibia
Nope. Judging by the picture of him after he was bandaged up, he cut like 6 inches below the knee. Right through the damn bones... yuck.