IFM's PAN 2 world model demo prompts questions about ink-in-water physics

Santiago (@svpino) shares an IFM demo video of PAN 2, an open foundation world model, showing ink added to a test tube of water.

He asks viewers whether anything in the video looks physically off, saying the expected dispersion is familiar. The post does not state what, if anything, is wrong with the motion, and no IFM response is reported.