What's a good excuse, to get a new iPhone

So my girlfriend threw my iPhone at me as a joke and she cracked my screen. What's a good excuse to tell the employees at the apple store so they give me a new phone for free?

If it's a cosmetic issue and it's not caused by software and your warrantee is up, there's nothing you can do. Apple is incredibly cheap when it comes to these things, and you'd have to pay to fix it. If the back were cracked, it would cost 30 bucks, but the screen is unfortunately upwards of 100.

Say it was broken in the box when you got home.