knight rider online

I'm watching KR straight through, and in S01E06, what's the stuff in the back seat as Michael and Maggie are getting out? It's at 44:15-17 on Netflix. I'm wondering if that's some production stuff they might've just left in there for whatever reason.

I remembered freezing the dvd at that same scene to see what were those items.I figured in the blooper reel David had the slate he played around with to mark the start of a scene so maybe production or David left a few things there.