4 times...

I was at Target yesterday and the checkout lady double swiped 4 different items. 4! She'd swipe it once, it would beep, then she'd accidentally swipe it again. With 4 different items. And each time, she'd look at me and smile and go "Oh".

So, what was the deal with that? Was she trying to see how many times she could do it before I said something? Was she nervous? Why in the world would that happen? I just do not get it...