I agree, could easily be BS coincidence. Don’t forget, Las Vegas is open-carry (of alcohol!). This lady could have simply had waaay too many free Screwdrivers from the casinos and was just pissed off at the crowd. [slurred words] “Y’all gonna die!” before passing out on the ground.
She could also have been so elated to be so close to the stage and blurted out I’m just gonna die! or This is just to die for!