When asked what you will be bringing to the table, do not snicker and think “table dances”.
I have never had a formal job interview where I was interviewed by a panel. I am pretty sure that nodding and informing the panel that I was nervous, it was my first time, but ‘what the hell, it’s good practice’ was not the best way of displaying my character. 
Neither was informing the principal that he looked like he needed to unwind and he should call me sometime– on my $1.70 line. *sigh* That only happened in my head, thank god, because if it had happened in real life I would definitely not have gotten the job. I will just have to wait and see how it went.