What I live for

I know no one likes a grammar-Nazi schoolmarm. But I still kind of love finding grammatical (our punctuational) mistakes  in writing that completely change a sentence's meaning. Case in point — this question on my assignment today:

How do side effects of Paxil effect consumers buying potential? 

I didn't know that consumers could buy potential. Where can I find some? And how much does it cost? 

Yes, that made me laugh. Yes, I thought I was clever when I spotted it. Yes, I spotted the wrong "effect," too, for anyone else who noticed.
And yes, I'm a TOTAL nerd.