This is from my calendar:
In August 1998, JoAnne Altsman of Beaver Falls, Penn., was vacationing in a trailer with her dog, Bear, and her 150-pound Vietnamese pot-bellied pig, Lulu, when she had a heart attack and collapsed. Lulu sprung into action: She sqeezed through the trailer's doggy door and ran into the street, where she lay on her back in front of passing cars. A driver who stopped and followed Lulu back to the trailer found Altsman and called 911. At the hospital, Altsman underwent emergency open-heart surgery and recovered. For her amazing bravery, Lulu was awarded a jelly doughnut.

Smart pig!