As Floyd struggled to breathe, Tobin said, he eventually pressed his own forehead, nose and chin into the asphalt, attempting to "crank up" his chest to let air in. But as Floyd turned his head on its side, Tobin said, Chauvin's knee moved further toward the side of Floyd's neck, compressing his hypopharynx. Anyone experiencing that type of compression would find it "enormously more difficult to breathe," Tobin said.

That's interesting. Autopsy didn't reveal any damage to that area though, i.e. the physical evidence doesn't support what that person is asserting, ergo it's just conjecture (invalid for coming to a sound conclusion).