> It ain't the volts, its the amps...

It's really the right combination / right circumstances. Even though
a single D-cell can deliver a few amps, it hasn't enough potential

http://en.wikipedia.org/wiki/Electric_shock

http://www.stanselectric.com/shock.html

You have people hit by lightning (sometimes several times, poor
buggers) who avoid death because the path through the body
missed the heart. Enough to blow them out of their shoes though

But grab a live appliance with the wrong hand .......

The situation with an inverter powered by 8 batteries is similar
to that of an isolating transformer. You probably wouldn't even
feel one touching one output terminal (assuming the whole thing
really is floating and there's no ground reference) but one in each
hand is not to be recommended

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