If you're in a subordinate position of some sort and pretty much all of us are at some point in our lives, your general tendency is to try and impress the people above you or person above you so well that they will like you, keep you or maybe promote you. In the process of doing that you are not aware that that person above has insecurities and if you try so hard they may see that you are after their job or that you are better than they are or they might envy the fact you are younger.