This joke is based on meeting a lawyer to his client in prison
A lawyer walks into his client's death row cell and says, "I've got good news, and bad news for you."
The prisoner says, "Okay. What's the bad news?"
"The bad news is that the Governor won't issue a stay of your execution from the electric chair."
"Oh that's terrible. What possibly could be the good news?"
"The good news is that I got your voltage reduced!"