Nothing annoys me more than going to a store and getting poor service.  You don't have to be in the best of moods, but a "thank you for shopping here" is very nice.  This woman, however is having none of that.  She does NOT like the cashier's bubbly behavior and intends on attempting to making her feel bad about being a good employee.  If this is your mom, let her know she's a bitch...but I"m sure you probably already know that.  Bless your heart.  -Morgen