What happens if someone throws a big stone to the back of you’re head? ?

depends on if they hit you or not

crack my skull? kill me? or both....what did I win?

Either you get crayons for Xmas for the rest of your life, or, you become president!

The word "you're" means "you are".

So you are asking what happens if someone throws a big stone to the back of you are head - doesn't make any sense, does it.

If you mean YOUR head, then you would be injured. You could have a concussion or something more serious. It could kill you.

What does this have to do with Religion.

If someone throws a large rock and hits a person in the back of the head, there is usually damage to the speech area, motor skills are affected, and there can be trauma to hearing and vision as well.

If enough damage is done I might start believing in a god or gods

Did one of the Voices really ask you that?

I will get hurt and seek revenge on the thrower, vikings dont forgive nor forget very easily...