Who is that girl?

Do you ever have times where you say something, you know you said it, but you cannot figure out where it came from? I have had a few of those lately.

1. On the Champs de Elysee in Paris in the Louis Vuitton
Jackson: "I'll buy you a purse if you want."
Jenna: "No, they're too expensive."
Jackson: "Oh come on! We're in PARIS!"
Jenna: Exits store
WHAT?! WHO WAS THAT GIRL?! She's the reason I do not have a nice new purse to go out with- how annoying.

2. In Best Buy
Jackson: "Do you want to get a new computer tonight?"
Jenna: "Oh, I do not know. Do we really need one?"
Jackson: "Sure. Let's get this one."
Jenna: "Nah, let's just get you to 'Hangover' DVD and go."
Jackson: "Are you sure?!!"
Jenna: Already at cashier with DVD only
Again- who is this chick that keeps turning things down?! What is happening to me?

Someone help me. FAST. :)