What an awkward situation he put you in! You maintained your professional composure, and I hope the event was fruitful for you despite his interference.
I had an encounter with an obnoxious a-hole at work yesterday. It triggered me and I was upset for an hour. I did some coulda-shoulda-woulda thinking; in the end I realized I couldn’t foresee the event, and I will now be better prepared for similar future events.