The application of high voltages to animated flesh and bone renders the former translucent and the latter luminescent, allowing the skeleton to be seen in the style of a classic X-ray for as long as the current flows. Despite the impressive light show, the victim will usually then still be alive, if a bit singed and shocked. Sometimes this is not caused by electricity but by another source, like a Disintegrator Ray. In this case, it is more frequently lethal, the skeleton just showing up briefly before the whole body turns to dust. Or, the skeleton is the only thing left behind.