A game

Last night my mother, Tamami, and I went out to eat. While we were eating, I had placed my cell phone on the table b/c it's too big to have in the pocket while sitting down for a long time. And then we ended our meal and walked out.

As we were walking home, my mother suddenly freaked out and asked whether or not I grabbed my phone. So I replied simply and calmly "yes." And then she goes on explains that she noticed it on the table and thought that I might leave it on my way out. However, she forgot to warn me when we were exiting, and I didn't forget to grab it.

I won...