Follower, have noticed the effect as well.
And I saw it. At 21:51 (9:51pm as the locals say here), I was outside. Woke up the two kids that had expressed an interest. The little girl liked it, but after a while she began giggling continuously until I put her to bed. And the next day that little girl was very angry that daddy hadn't woken her up. She had to believe us when we told her that sure we had done so. But it was very hard for her. She didn't remember a thing anymore. It does not seem likely she will get a chance to see it again in her lifetime.