While I was in service of XXX and on assignment/and later freelancing overseas, I would occasionally get a bewildered look and the person would ask "Where did you learn that?" and I would reply "The boyscouts" They would laugh and that would be that.
Later as a civilian, friends would occasionally remark how I was prepared for everything/how did you do that/how did you know that... and I would reply "The boyscouts" and they would laugh and that would be that.
but I was actually a boyscout! It's not just some ploy to be cute/snide/smart(assed)