I wouldn't personally bother unless I was able to draw out an IOI before words had been exchanged.
If I managed that then I'd probably take one of those little dividers and place it down so that one of her items ended up on my side of the conveyor. When she went to take it back I'd make an issue of it (joking). "Excuse me, miss. That's my (whatever)." Judge her reaction to see if you've got a shot. If she smiles then you're good.
"No it's not."
--"Uhh, yes it is. I specifically remember taking it from the shelf."
"Uhh, no."
--"Hey, look. If you really want it then that's fine. But it was mine."
If she relents and gives it to you then turn it back.
"No, now I feel bad that you're going to go without a (whatever). Tell you what. You give me your number and you can have my (whatever). That seems like a fair deal, no?"
Fairly reliant on solid cheeky-monkey game, but certainly an option.
If I managed that then I'd probably take one of those little dividers and place it down so that one of her items ended up on my side of the conveyor. When she went to take it back I'd make an issue of it (joking). "Excuse me, miss. That's my (whatever)." Judge her reaction to see if you've got a shot. If she smiles then you're good.
"No it's not."
--"Uhh, yes it is. I specifically remember taking it from the shelf."
"Uhh, no."
--"Hey, look. If you really want it then that's fine. But it was mine."
If she relents and gives it to you then turn it back.
"No, now I feel bad that you're going to go without a (whatever). Tell you what. You give me your number and you can have my (whatever). That seems like a fair deal, no?"
Fairly reliant on solid cheeky-monkey game, but certainly an option.
The public will judge a man by what he lifts, but those close to him will judge him by what he carries.