Volt amps is a measurement of power, not energy.
You don't store volt-amps, you store watt-hours.
It's power that kills, not energy. I can swim in a large river with no harm. But a river is full of power (kinetic energy of millions of tons of moving water. Transfer of that energy into my mody is insignificant. Similarly, I can climb a mountain and live there for years with no damage. But a body high above ground has potential energy; I won't see even a joule of it unless I fall into an abyss. Measuring energy is only important if you are building a battery-powered machine and want to know for how long it will work. We already know that an EV will kill at least one man without much drain on the battery; counting past that is not productive.
Electric power kills by two most obvious methods and by several less obvious ones. The main injury comes from interference with your nervous system. A light shock can desynchronize the heart, and you are done for in a few minutes. Then the thermal effect of the current heats the tissue up; skin burns, muscles cook. Among less obvious effects is the involuntary muscle contraction that can cause you to injure yourself. I'm not an expert on safety, but I sat through a short, formal course many moons ago.
Typically the damage is proportional to the current, not to the voltage. A 25 kV zap from a TV tube anode may not kill you, unless you try hard. At the same time even 48V can kill you if you fall onto bus bars and break the skin. The majority of insulation is in the skin; everything else is very conductive, like a bag of salty water that we are.
An EV or a hybrid is pretty dangerous because of two factors. First, it has voltages high enough to punch through the upper layers of skin. There is a considerable nonlinearity there, as with all dielectrics near their breakdown voltage. Second, once the channel is established the EV can deliver current that can kill a whole herd of elephants. If you are a witness of an EV crash and want to help, you must walk very carefully, watch your step, bypass puddles of conductive liquids, and operate with one arm only (the other must be behind your back at all times) - and still you must watch your shoes because the return path will be through the ground. Best if you don't touch anything at all and use an isolating pole; but chances of you having one are near zero, unless you can flag down a utility truck. Those guys usually have safety equipment and can do the job easily; they are trained on all that and they regularly work on transmission lines that are far worse. Firefighters are also aware of electricity because they deal with household voltages every day and with higher ones whenever a transformer blows up.