I'd hazard a guess that the person is using 120vac 60Hz instead of 230/50. 120vac is not as dangerous as 230 w.r.t. this kind of accident. I agree that they seem to have only held the fixture with one arm and probably standing on the leg with the arm outstretched or at least biasing weight to that leg to help reach. the current likely didn't go deep and didn't go across the heart. i agree that there wasn't a hard connection but must have had a path through the fixture that wasn't pure... likely a wire rubbed off the coating a bit but not quite fully so there was not a good connection to shock him with much current.