Agreed, unless you're doing something to draw attention to yourself/your products, you'll have passed from our minds before you've even finished walking out the store.
That being said, I did have one time I got a fun comment. I was chatting with a cashier at a different Walmart ( I don't buy where I work, that would raise questions), and she'd been about to end the conversation with "and here are your" books or your milk, or whatever. Then she actually looked down at what she was handing me and stopped, then said something along the lines of "um, here you go."