Originally Posted by Big Swami
I just happen to have known a guy in my past who would take a great deal of joy in being rude to people right in their faces. If someone made a joke and he didn't think it was that funny, he would offer up an obviously fake little chuckle so that you would know exactly how little you amused him. He did this to everyone - friends, family, strangers.
He worked in service jobs and was forced to tell people "have a nice day." So he practiced a way to say it in the most insincere way possible.
When you're a teenager, that kind of guy is hilarious. When you're in your mid 20s, you figure out that it's kind of sad.