Hate when I put through products for customers then proceed to tell them what the total is, they choose That moment to look for their money. Especially people who carry large bags and have to dig deep to find their purse/wallet. I'm standing there like really, you didn't think you'd need to pay for all this? It didn't occur to you to grab the money before you reached the register? Then when they do find their money, they want to pay some by cash and the rest on card/coupon. Just smile and wave.