This video is (reputedly) what dense hydrogen looks like, in response to a strong magnet –
https://youtu.be/Epenv-PPLJM Somewhat mind boggling, shall we say. If not dense hydrogen, it is unclear what else the ghostly filaments could be. Apparently it is paramagnetic and possibly superfluidic, whereas hydrogen is a diamagnetic, invisible gas. Or more to the point – what else could one do with the material to proved its identity/characteristics? One of the things (phenomena) which comes to mind … LOL … “ectoplasm” which is somewhat fitting given the circumstances.