Relaxed enough. Come prepared though, know your strengths relating to public speaking, managing groups, and conflict resolution. Straightforward behavioural questions, they want to filter out people who (i) will be afraid to take charge of a stressful situation, (ii) can't be relied on to communicate effectively, (iii) have no interest or ability in learning new things, and (iv) would present as rude, vulgar, or uninterested.