In Iran, a funeral for a pro-reformer Ayatollah turned into an impromptu opposition rally with chance against the country's supreme leader ringing out.
But exposing yourself to impromptu discussions will be a very important part of your practice and it will help you to reduce your fear around speaking.
But over the past year, I've also caught myself feeling bereft over the absence of briefer interactions, even those impromptu two-ships-passing moments, with more casual friends.