Ok, believe it or not we saw a documentary regarding the siege of castles and once the one sieging dug a tunnel under the tower of the sieged. He then ran a herd of pigs into the tunnel, blocked it off, poured some sort of flammable liquid into where the pigs were and set it afire. The ensuing blaze was so hot, the stone masonry collapsed and the tower was taken! The ruins of the tower still stand to this day.
King John of England (1166 to 1216) used flaming pigs during his siege of the Rochester Castle.
So, you are right.
"A pig on fire, running around, is no good."