How have I downed you?

It makes no sense that I downed you

All I did here was chuck rocks at you
Wait, that "s" should not be there at all
I chucked a single rock at you
And yet that caused your ass to fall
A pebble of a rock slung at you
Made you crash right to the floor
Allergic to what this rock's made of
Still doesn't make sense, dude

How could one tiny-ass rock down you?
It hit your head, not your big ol' balls
Sure, I'll take the win, but I still frown, dude
No way that shoulda worked at all

Oh-oh-oh, oh, oh-oh-oh
Oh
Oh-oh-oh

When I set off to try and down you
My jaw hit the floor
I'd heard you were tall, but this was just nuts
Tempted to run out, true
"What was I thinkin'? I can't down you"
Not that I relayed that simple thought
I said God told me that I could down you
Which He did, just left out my shock

One rock from a sling just downed you
That's all it took for you to fall?
To fall, to fall, to fall, to fall
To fall, to fall, to fall, to fall
Tiny rock between your eyes
Wait, that's all it took for you to die?
Did just hack your head off, fine, fine, fine, fine, fine, fine, fine, fine, fine

Just knocked you out, true
One small stone made Goliath fall
That's all, that's all, that's all, that's all
That's all, that's all, that's all, that's all