Asking "what's funny" is a great response. And you are right - hopefully the interviewer would give an explanation for the laughter. Re the Russian - it sort o

Asking "what's funny" is a great response. And you are right - hopefully the interviewer would give an explanation for the laughter. Re the Russian - it sort of depends if the company is mostly Russian or not. If the culture at a company is such that it's offensive to smile/laugh then it would be better for a laugher to join a different company - ie be gated out, no?