On a given night, 2 deathrow inmates are scheduled to be electrocuted on old sparky. While one execution is in progress, the pastor admisnisters to the other condemned man in his cell.
"Don't worry my son", says the pastor, "as soon as the high voltage reaches your brain, it numbs all your senses, so you won't feel a thing."
Suddenly some horrible screams are heard throughout the entire cell block. The pastor immediately ask one of the guard "What is all this screaming about?"
Not to worry pastor, we had a power failure, so we're finishing the first execution "by candles".