Scooby-Doo

I knew I had to be very careful when I was crafting the story, so that it wouldn't be a Scooby Doo moment—you know, the one where the villain rips off his mask and tells you why he did it—and that he would have gotten away with it, if not for those pesky kids!

2006, Sue Owens Wright, How to Determine If Your Dog Is an Einstein—and What to Do If He's a Scooby Doo http://books.google.com/books?id=CB6xLa27xnkC&lpg=PP1&pg=PP1#v=onepage&f=false