The feet are doing unusual movements. Reminds me of leaf node cumulative error in overcompressed hierarchical animation.

yeah the video models still do not understand physics the way humans do. We are getting there one step at a time. By the way, I am seeing a lot of people complain about google billing not working well. I was able to generate these for free without signing. Look at the results and try to come up with your own failure and working use cases.