ITH~ Absolutly act as-if!!! It's good that he acted 'as-if' once he did get over where he was going so no need to dwell on what happened. Now at least you will have a better understanding of how to deal with it if he acts 'alien' again.
I wish you so much luck with tomorrow and forward. This is such a good thing that you get to prove yourself. I am sending good vibes your way!!!