Do other people believe in your word? Your choice: Worrying about others can not concentration on People basically don't believe what you say. You're kidding because of your natural instincts, so your words aren't serious. People always think what you say is just a joke, and it doesn't have any credibility. This type of person is unrestrained, and often gets nervous situations to scare friends, and after a long time, everyone will think he has no credibility at all.