Beyond initial bleeding - extensive gastrointestinal issues, depending on where it hits. If it lacerates part of the intestine, it may leak feces into the abdominal cavity. It would require flushing and antibiotics to prevent going into sepsis from massive infection.

If it does enough damage, you could be looking at removing a portion of the intestines and possibly requiring a colostomy bag.

Abdominal wounds are no joke. The liver bleeds profusely if lacerated or punctured. All of the blood flow to the abdomen exits through the liver into the inferior vena cava.