My son and I were waiting for our turn at a crowded climbing facility (rock walls, zip lines, etc.), and the man standing in front of us, as we were sitting, had his pants unzipped, and you could see his underpants a little. My son leans over to me and whispers "Mom, that guy's pants are unzipped" and I whisper back "yes, they are." so he says "Do you think I should go tell him?" and I said "Probably, but leave me out of it, like don't go say 'my mom says you should zip your pants' or anything" (he's 8, so I tend to explain what he should and shouldn't do.... so he stands up, walks over to the man and says, in a LOUD, clear voice that travels really well "Excuse me! MY MOM WANTS ME TO TELL YOU THAT YOUR ZIPPER IS DOWN AND SHE CAN SEE YOUR UNDERPANTS!". Oh Lord, it was the kind of moment where if I still could be embarrassed (I can't), i totally would have been.