Implied in the caption is that the speed is the same at all heights (given that an increase in distance is implied as an increase in time.)
This is again obvious nonsense - speed is a function of thrust versus drag, and it's safe to say that both of those are affected by air density.
It becomes even less true once one gets to space. There height is a function of speed which means that to "catch up" something in front of you, you need to slow down.
Can you expand on this? My brain is not connecting the dots.
EDIT: I remembered another issue. I'm not able to use it at work because my employer doesn't allow extensions that access all data on a website.
I found this while looking at what https://www.endlesspaper.app turned out to be.
We released inference code and weights, you can check our github here: https://github.com/kyutai-labs/hibiki