...you've completely substituted the word human for muggle.
...you injure yourself and complain the medical staff is taking too long on your recovery.
...you're perplexed as to why the pictures in your textbook are frozen.
...you scream in horror when seeing people mishandling the broom for purposes beyond flying.
...you fear the local delirious bum sitting along the sidewalk is chanting under his breath forbidden spells.
...you get a cold chill from the air conditioning and have second thoughts that it's actually a demeantor nearby.