Ahh shit man. That sucks. Let out a big cry and pick yourself up. Eventually, the feeling will pass and you will have to face the world once again. Develop a tough skin, and if someone puts you down, check them before your wreck them. Fuck those assholes. They don't define you and your existence. I have faced similar shit in my life, too. Not as extreme, but there were MANY times where I would go to order food, stutter and the cashier would call someone else to take my order because they can't be bothered with me anymore. Now when it happens, I just smile, take it on the chin and place my order. I cannot let them ruin my self-worth and self esteem. Fuck them.