A train engineer with a so so track record, is operating a train.When he sees 3 children playing on the track.He tries to stop but is unable to stop in time.All the kids are killed.He ends up being charged and convicted for murder,as they thought he should have been able to stop in time.The penalty is execution by electric chair.On execution day he asks for 3 bananas for his last meal.They secure him to the electric chair and flip the switch,he doesn't die.So they try once more,again he doesn't die.So he gets to go free.Years later while walking down the street he is recognized by one of the people on the execution team.This person still amazed by the survival of the electric chair had to ask,what the bananas had to do with him surviving the electrocution.He replies nothing,I'm just a lousy conductor.