And to answer a few questions:
You just called him a man, so "zero".
Probably not even one. They get tired quick.
The cannonballs will always fly. Sad, but true.
The life expectancy of a mountain varies with glaciation, tectonic uplift and rainfall.
Some people live their whole lives in slavery.
People can ignore reality for a long time. We like to think they confront it on their deathbeds.
Once. I mean, really, the sky's right there.
Again, one ear should be enough.
Sadly, it takes far too many deaths before people grow sick of it.
Maybe we'll stick with Puff, the magic dragon.