Sometimes you just have to close your eyes, count to ten, take a deep breath, remind yourself that you wouldn't look good in prison stripes and just smile at that dumbass and walk away. Well, not just sometimes.
Sad but unfortunately it is so true for a lot of people. Being sad is part of being human in this fallen world. Some people think showing sadness/vulnerability is a sign of weakness but its not! It's a sign of bravery!