Random prop + off-camera-flash experimenting - amplified turns into yet another Harry Potter moment. Impressively, the flash will trigger even when almost entirely blocked by hands, or Magic 8 Ball. I will confess, I've never read a Harry Potter, but I have seen the movies and generally think they're ok even when I hate the directing and the jittery storytelling.
* it came up as "Ask again later"
and here... www.myocliving.com/blog/?p=607