Even if the other forms of energy and matter from the supernova explosion were removed, the ultradense burst of neutrinos alone would literally vaporize someone from the inside in close proximity. While neutrinos are most often harmless, this is one of the few times they can be lethal. In a core-collapse supernova, roughly 99% of the energy is released as a burst of neutrinos, totaling about 10^53 ergs over 10 seconds. So the neutrino flux from the supernova would be so insane that enough neutrinos would collide with the atoms in your body to deposit lethal amounts of energy. This ultimately leads to one being vaporized from the inside!