When people are promoted, there are a lot of feelings to consider. Those promoted might feel a sense of pride in their own success but also anxiety about their new responsibilities. Others will have thought they would get promoted and didn’t. Some will feel excited about having a new boss; others will feel unmoored and frightened of change. The effects of those feelings will show up in unusual ways and at strange times, and being aware of them, understanding and managing them, is essential to the success of any leader. This was one of those management lessons you learn only from experience.