Humor can be a valuable skill in many workplaces, whether someone is looking for a job or currently employed. The complications of trying to be funny can backfire when used too often, with bad timing or in poor taste. Jessica Ollenburg, CEO of HRS Inc., talks about the mistakes made by the class clown in the interview, during a work meeting, and even during business transactions. Humor is subjective, handle with care. Nobody's Perfect looks at things a little backwards: What NOT to do. Mistakes are often the best teachers and errors in judgment cross all industries. Job seekers and executives alike commit a variety of blunders that you can learn from so you can avoid the common, damaging missteps.