Wasn't the trigger for Abby just seeing the smashed windshield? The car in the junk yard that Young Abby was looking at had the same thing (either that, or it had that pine tree air freshner).
I liked the Young Abby actress . . . not as much as I like the Young Snow White actress on Once Upon A Time, but she did a good job.
Gibbs . . . . love that man. Keeping that fortune all this time. He is quite the puzzle, but you can't help wanting to hug the stuffin' outta him!