The doctor poked and thumped and measured and timed and put poor Earl through every test before he gave him the sad diagnosis of terminal cancer.
"What's it from? What caused it?" Earl cried. "I've lived a careful life, I've eaten all my vegetables, stayed away from meats--"
"Ahah!" the doctor said. "Peas?"
"Yes, peas. Tons and tons of fresh picked green peas."
"But Earl," the doctor sadly shook his head and continued, "that's where the kryptonite is stored."