A live flower growing out of a dead flower

My wife and I live in West Caldwell, New Jersey. The other day, we noticed, in a row of zinnias we have growing by the front door of our house, one where a full live blossom seems to have sprouted from the top of a dead blossom. We had never seen anything like this before and wanted to share the picture.

 

Pretty neat little error! I guess a little bit of the tissue that initiates flowerhead development was left over after the first one was produced, and it took a while for enough hormone to be built up (or disappear, I suspect it is built up though) for it to reinitiate flowerhead development again.