As someone who has ran with a tiny necklace: Yugi should get bruises or hold tightly to the puzzle every time he runs.

It should be thunk thunk thunking into everywhere that chain can reach. I got whapped in the face once its not even hard.

I got bruises and that thing looks sharp and heavy. The only escape is holding the puzzle or cuts.

(Unless Yami be pullin some shit. In which case thats fair and valid and approved.)