"If a person wrongs you, no need to go and seek revenge or let it worry you. "Take the high road" and let them take the low road. "
There are always highs and lows in life. The same goes for work life. In my line of work, it is not uncommon to be on the receiving end of unfair requests or demands from customers. On rare occasions, there would even be verbally abusive customers. It will always be a learning experience dealing with them. At the same time, a reminder to self to never be like them.
On a lighter note, receive some very nice souvenirs from sis-in-law below. There are people in this universe who still loves me : )