About the thing that you're funny in one environment but not in a different is interesting. I felt it a lot every time I migrated to another country, in the one before I knew the language, the social norms, etc., but in the new one suddenly especially the language brier would basically destroy my ability to be funny and witty. And that until now happened 3 times to me. But now I'm funny int two languages and working on being more comfortable in English so I can get better timing, etc. while doing jokes and stories.