Yes that is a knife and the kid did survive. How he "accidentally" got this stuck in his head is a different story.
This happened to the kid because of some black magic rituals. There are something like 40 needles in his body.
The construction worker fell off of his ladder and landed on a drill he was wroking with. He is fine but got to take this home as a souvenir.
The dude's room mates managed to get the tv remote lodged in his backside. With roommates like these...
This is one of those cases where the doctor left the tools inside a patient. 18 months later they figured out what was wrong.