mostly in two ways: either they had to laugh and restrained themselves rapidly, or I noticed they are uncomfortable not knowking how to react to not make me even more agitated. in both cases I said "it's ok, you can just laugh" :) the key is to not take it and yourself seriously. I was a very insecure person, but with time it got better, and I learned to accept it. but this are just words coming from someone who made it, believe me, it's always easy afterwards to say it. I had people tell me that and it wasn't a great help for the moment, because I never knew if I got to that point one day.