TA - You are totally normal and made a normal oversight. So should you be shouted at? Do you shout at your colleague when they forget to press LNAV yet again? OK, here's the list of unpleasant and discourteous UK security staff locations - NCL, MME, LBA, CWL (by a mile), MAN, EDI, LHR, BHX, BRS (foul people). Obviously, there are many exceptions in the staff at these locations but in general they appear to be led by people who have no concept of respect or consideration. This is picked up by the staff and they treat you however they wish, without sanction. The problem is they are so far up themselves being unpleasant shouting and ordering people about they have little capacity left to do their real job - keeping the bad guys out.