Years ago I flew as a passenger in a hot air balloon alongside another balloon when the wind picked up. We landed near Davis CA, our basket flipped and we all held on with no injuries. The other balloon did the same and a young woman, who we just met in the van an hour, earlier perished. She was ejected on the flip and apparently did not attempt to break the impact with arms or shoulder. She bled out and died. The FAA ruled pilot error.
So there is some plausibility.
But no balloon.
Difference is, she was ejected. Joe’s girl allegedly fell over. With any type of syncope, there is typically some effort to gain support or reach out before blacking out. If not, simple fainting episodes would be resulting in a lot more deaths. Also true for cardiac conditions. I think it’s rare to completely collapse instantly and die from the impact. I’m not saying it’s not possible, but I am skeptical.
Did 20 people witness her fall in his office after hours?