Answer: "He's frying now!"
As Del was electrocuted and died his awful death, Wild Bill was having a great time in his cell. He kept yelling repeatedly, "He's frying now!", along with "They're cooking him good!". He also said that he could "smell the gumbo", and even made up a song about "a French-fried Cajun". Paul came in and told Wild Bill that he was 10 seconds away from spending the rest of his life in the padded room, which shut Wild Bill up for the time being.