Have you ever seen a little kid fall down? And they start bawling uncontrollably? So you go over and check them out, make sure nothing is broken, and maybe you say something like "it's all right buddy, you're ok", because they aren't actually hurt.

The kid, despite having perfect knowledge, has incorrectly judged the severity of the situation. This happens with kids, because they don't have enough experience or emotional maturity to appropriately gauge their emotional responses, much like the people who write lists like this.