Well, I wasn't able to watch the cross examination due to life being in the way, but it sounds like the Doctor was a pain in the ass.
Inb4 cope mode, yeah, that kind of delivery is extremely effective with average Joes. It just works. There is a nurse on the jury however, and nurses loathe that kind of doctoral grandstanding.
If Chauvin gets convicted it will all have come on that Doctor. Anyone spouting off percentages and therefors and it's complicateds while explaining his calculations on lung volume is a weasel. And thats kinda what the prosecution really needed.
People want to pick at Nelson for this, but unfortunately it takes a doctor to call out another doctor for being shit. There was nothing he could have said without some kind of doctor backing him up, especially when claiming shit like "hoho, most people's lungs aren't damaged by smoking" and "well I didn't get to examine the body so"
hold on the fuck did I miss