That sounds like one of those times where you don't want to really show off your thong but another part of you really doesn't care who saw it. I have those moments often when I am on vacation. If we are out and about shopping and walking around, I tend to wear shorts that are more sheer than others. If anyone looks closely they can clearly see my thong or g-string under my shorts. Never had anyone make a comment or make a reaction so either they didn't see my thong or they didn't care. Hopefully they thought it was sexy and told their significant other that he should start wearing them!