Cracked head or bad head gasket.
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No, head gaskets usually blow because the engine overheated or there was a defect in the gasket or head during production.
When getting out of the shower and blow drying your hair, try blow drying upside down. That will give your hair more volume including the back of your head.
A blow to the head would cause swelling.
No because there is not a bomb or a grenade in your head
The blow on the back of Oscar's head rendered him insensate.
because they can bite your head off
A head gasket can blow on any thing.
Let the engine overheat will normally blow the head gasket.
Hitting the back middle of the head on a shelf can potentially cause a head injury such as a concussion, scalp laceration, or even a skull fracture. It is important to seek medical attention if symptoms such as dizziness, headache, or nausea persist after the injury.
They have a blow hole on top of their head/back It can open and close to breath in and out, and to keep the water from getting in.