Toy Story 3 Fan Spots a Head-Scratching Mistake With Slinky Dog's Escape

I have always wondered how Slinky Dog got down in a specific scene in Toy Story 3, and once I looked closely, I think I found a genuine movie mistake that the film never bothers to explain.

The scene in question happens when all the toys have to grab onto something magnetic so they can be pulled up to the ceiling. Slinky Dog does not need to grab anything else because he is already magnetic himself, and he is actually the first toy to fly up to the magnet.

After the toys save Lotso, they are propelled to the ceiling and something changes

Right here after the toys save Lotso and get propelled up to the ceiling, they look around and the other toys are no longer up there with them. As I point out, all the metal pieces did stay up on the ceiling, but the toys themselves are gone from that spot.

My question: how did Slinky actually get back down?

This is where the mistake comes in for me. Slinky was stuck to the magnet on the ceiling, and from what I can tell, no one was next to him who could have helped him get down. Despite that, Slinky is somehow back down here with all the other toys later in the movie.

As I put it, "it is never explained and I think this is a movie mistake." The film simply skips over how he made it back down safely, and there is no scene or line of dialogue that clears it up.

Did you ever notice this gap in Toy Story 3, and do you have a theory for how Slinky actually got back down?