I have heard many friends claim that a professor held a grudge against them and caused them to fail a course. Have any of you guys ever had this experience. Recently I left a book in my History class and my professor was teaching a different class and without thinking I walked in and got my book… well right when I got to the door the professor began yelling at me saying something to the effect of How dare you walk in here while I am teaching next time wait till the end of class, Do you understand me? It does not sound too bad but they guy was yelling very loudly. I can understand him being upset I should have waited but I think he blew it way out of proportion and overreacted. I am kind of scared he will hold a grudge against me for this. Anything like this ever happen to you? Has a professor ever held a grudge over a minor mishap, Did your grade lower?