Uh, okay Miss Five-Finger-Discount, if you want a chocolate milkshake, I'll just buy you one. No stealing food while I'm around; consider it my treat this time, okay?

[It's not like they're robbing a bank or anything, but her powers still make Marty a liiiittle uncomfortable.]

I still gotta order, anyway. [He says, as if that's final, and begins to get up as if to accentuate this.]