It's bad to yell at anyone.
Sally is grocery shopping on her way to pick up her kids at the babysitter.
Sally wants to get to the babysitter's house on time.
Sally is kind to the cashier and helps her bag the groceries.
Sally raises her voice at the cashier and insists the cashier move faster.
The cashier appreciates Sally's help and smiles as Sally leaves.
The cashier gets very upset and asks Sally to to leave the store.