Terrifying moment

I went upstairs to get Norah up from a nap this afternoon. Lolo said she wanted to stay downstairs and continue playing. When Norah and I came downstairs, I couldn't find Lolo anywhere. I kept calling out for her. No reply. Checked all the doors. Locked. Where was she?!?! I had only been gone long enough to get up the stairs, pick up Norah, and come back down....I was in a panic. Finally checked the coat closet.....only to find her grinning up at me. We had a long talk about her not responding to me when I was calling out to her. She said, "But I was playing hide and seek." I said, "Yes, I know you were. But you didn't tell me you were playing!"