I "thought" I had lost my dd11 when she was 9yo. It was dark, after the nighttime parade (shoulder to shoulder people), we were a large group, she was w/ me & my group, said she told me she was running ahead to our others in our group who were just a bit ahead of us (but I didn't hear her say this)... to me, all of a sudden she was gone! I screamed for her (my mom and my ds were with me) - they stayed outside screaming for her, I ran into a shop and said I lost my dd, she was wearing this and that, they kind of just looked at me. I said "aren't you going to use those walkie talkies and help me???" One of them took me outside but was no help, I finally thought 'let me cell phone my sil in the other group and check with them', and she was like "yep, dd's here with us, what's the problem?"
I ran up to where they were, started crying, ds8 was hysterical crying and hugging her. They all had no idea what we just went through. I will ALWAYS have my kids keep a cell phone on them at the parks from now on. AND I think it's easier to lose a kid when there are multiple adults watching them all. If it were just me and my dh and 2 kids, we'd each have one by the hand. There were 9 of us, so kids are running back and forth to cousins, parents, aunts, uncles, nana, etc. Of course, that was the end of that (running back and forth between adults). If it was daytime and not just after a parade, it wouldn't have been as bad. But it was a horrible 5 minutes for me.