When performing a comparative analysis to determine whether an alternative means of execution would significantly reduce a substantial risk of severe physical and psychological pain, should the comparison focus only on fear and anxiety experienced after the introduction of the fatal stimulus or also include the fear and anxiety leading up to the introduction of the fatal stimulus?

Does the State of Alabama's nitrogen hypoxia execution protocol, which causes a human to consciously experience symptoms of asphyxiation (air hunger, shortness of breath, aching lungs, elevated heart rate, blood pounding in the ears, the feeling of conscious suffocation or of being trapped deep underwater) for two to seven minutes, constitute cruel and unusual punishment in violation of the Eighth Amendment where a feasible and readily implemented alternative exists and where that alternative causes a rapid death in which the inmate feels an impact, shock, and numbness, but not pain?

Whether the Eighth Amendment prohibits execution by nitrogen hypoxia that causes prolonged conscious suffering and asphyxiation when a less painful alternative method of execution exists