That Moment in Your Head

I was walking through a parking garage in Atlantic City this morning and I had an idea. An exciting idea! I thought, yes, I have to write that story. The premise, the outline was there, in my head, all of it.  I had my hands full and couldn't write it down or put notes in my phone, but it was so outstanding, of course I'd remember it, right?

Then I got busy, went about my day, drove back up to work (2 hour ride) and then finished my regular work day. Came home...ordered pizza and then remembered...what?

ARRGGgGGH! It's gone! That great idea I had in that parking garage in AC is out of my head. Frustration! When I had that idea, I thought; this is great! I'll never forget it, it's unforgettable!

So, now I'm just writing down random words on a page, hoping to trigger something.

             She knew something
             She discovered a secret
             Blood there was something about blood?
             Investigates until she discovers ...what was that?

These random scribbles aren't releasing anything from the dark chambers of my mind. How could this just slip away when it felt so memorable?
This ever happen to you? Any tricks on how to call back those lost ideas????