The power of just sending off an email! Something you never think of doing because you figure nobody would bother responding.

I am always surprised when that works and actually get a response.
I did that once when I saw an old music video of a song I liked and it was listed as "Version 2" of the video. I didn't remember any other versions and got stumped trying to find any info online about it. So I found the artist's personal website (which she ran herself) and sent in a question through that. 5 minutes later, I got a reply from her directly. (Turns out there was just a slightly different edit of the video.)