I like the POV you've chosen here. I also like the use of a narrow DOF but for me the focus is on the wrong area. I would have liked it better if the focus was on the girl's eyes or at the very least the entire bowl was in focus rather than just the back end of it.
I like the shallow dof in this. I think a tighter crop on the left and right, though, so that the sides of the popcorn "bowl" weren't visible would make it seem a bit more complete, though.
Like the idea and DOF and lighting work for it; I'm finding her ear a little distracting. Might like to see a hand (hers grabbing or yours defending the popcorn, or both) to give this a little more impact.