Grammar Nazi

I stared at the man on my doorstep, curious and worried. "Any problem, Sir?" I cast a surreptitious glance at the rifle he clamped in his beefy hands.

"Yes. I am a Grammar Nazi. My colleagues and I rummage the world in search of those criminals who use wrong grammar, especially on the internet,"

"Oh." I nodded.

"Indeed. And right now, your under arrest!"

I couldn't help it. I laughed.