The Kindness of a Stranger

I was at Walmart one day waiting in a typical long line that you see at any Walmart. Well I was standing in line for what seemed like an hour because this lady was buying up the whole store it seemed like. So it took the cashier forever to even scan the items. When she was finally done scanning the lady pulled out a bunch coupons. At this point I am just looking for another line but all the other lines were just as full. So after scanning all the coupons the total came out to be about thirty dollars. Well I guess the lady thought the total was going to be no more than twenty dollars and she started cursing at the cashier. Well the lady behind her just ended up paying for her whole groceries so she can just leave. If that was an act of kindness, or just trying to get her out of there, I will never know.