[willhe64]

The OP was minding his own business. Some waste of life comes at him with a Hammer.
I wouldn't shed a tear if extreme action was taken and the hammer wielder was killed.

If you act outside the law, why should you have the laws protection?

We should not value the life of a deranged harmful individual the same as that of an upstanding productive member of society either. Darwin was supposed to sort this out but now society is filling with burdens on society.

I don't carry, would have done the same as the OP did. Got out of there and called the cops. Would not of shot him had I been carrying as the option to flee was there. Still if someone did, he should not spend one minute in jail.