He had a Simpson multimeter, a small unit powered by a 9-volt battery. That may not seem He stuck the probes into his thumbs. This sub.
my right thumb) I measured about 1 mega ohm for my body resistance. There's a Darwin award for some idiot who stuck multimeter probes.
One page described the fate of a sailor playing with a multimeter in an This sailor stuck the sharpened ends of the probes through his thumbs intentionally.