The best way to terrify children on Halloween is to take them along on your morning commute and explain to them that theis will be part of their daily routine for about forty years.
Once there were people who knew all sorts of surprising facts. We respected them. Now, when people know surprising facts, we just figure they spent their lunch-hour at wikipedia. There's no thrill to being informed anymore. That's why I became a wikipedia editor. BTW if anyone tells you Halloween is about 'giant duck aliens', you're welcome.