It appears Peter Jackson's ulcer was nothing to joke about. The acclaimed director underwent emergency surgery to deal with a perforated ulcer earlier this week. According to CBS News
, perforated ulcers can be dangerous. The report notes, "They occur when an ulcer eats through the lining of the stomach or small intestine. If it breaks through, stomach acid can leak into the abdominal cavity. That's why doctors are quick to repair it with surgery. Most other ulcers are just treated with antibiotics and antacids."
Happily, Jackson is resting up and should recover, but the surgery is still expected to delay the start of filming for "The Hobbit." Considering all the issues with the long awaited prequel to "The Lord of the Rings," however, it's sort of par the course at this point.