there was this awkward moment, right, we had to stand and shout "yes sir" when we were called for interviews, but for basically the rest of the time we were there we always said "yes staff" etc. so when i got called for interview i said "yes staff" then the pti said "its sir" so then i shouted "yes sir" but i don't think i needed to, because interviewer had already walked away and i was just left feeling stupid