Write about something or someone that is: angry.
I can't say for sure that this guy was ticked off (in fact, I'm fairly certain this is just the way he looks all the time), but he definitely looked like it:
That's Houdini the Great Horned Owl from the rehabilitation center we visited yesterday. It was so cool to be able to get so close to him.
Even if he didn't look particularly happy about it.
Put your hand against my side
To get a taste of what's inside.
Feel my heart beat against my rib cage
While I tear another page
From this book filled with rage
That spilled from my pen
But only when
I let my guard down,
When no one is around.