Answer:
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
You can hold it without using your hands or your arms. What is it?
I hide but my head is outside.
The weapon of choice to create the biggest shock.
A muttered rumble was heard from the pen, and I, in my walking stopped to look in. What was this I saw? A massive beast, hoofed, and jawed. With spikes upon its mighty brow, I watched as he struck the turf and prowled. And yet for all of his magnificence, he couldn't get out of that wooden fence.
I flow from the Homerβs mouth when he sees doughnuts.