Appositives Edit Meaning

1.

Creatures who inhabit the dense forests of North America and High School literature books, in search of lazy students and grammtical errors. Though, they carry out their grim duties will a smile on their face. Always.

I was nearly slain by a rabid appositive, but Mr. Voltaire beat it with a club before it's sharp-fanged smile tore me to shreads. I'll definitely complete my homework from now on!