My friend and her husband went on vacation and when they came home they were busy unpacking when they opened the refrigerator and found their cat had gotten trapped in there when they left for their trip. The cat didn't seem quite...gone yet so they called the vet and explained what happened to him. The vet told them to put some gas on a rag and wave it in front of the cat's face. So the husband grabbed a rag and put a few drops of gas on it and waved it in front of his face. The cat twitched and started to come back to life, so they put more on the rag and rubbed the cat's face on the rag. The cat suddenly leapt up and started running around the house like mad for a few minutes, then fell over. So they called the vet and told them what happened and the vet said "oh, he must have ran out of gas."