A farmer named Jet owns a team of mules.

These mules help to plow fields and do other such chores on Jet's farm. One of these mules has a very special gift. He can breath fire. None of the villagers believed Jet when he spoke his fire-breathing mule. So, one day Jet took his mule into town to prove to everyone that he was honest about this mule. He went to the middle of the town square. As soon as a sizeable crowd had gathered around him, he commanded his mule to show his ability. The mule opened his mouth and let forth a brilliant blue flame. The villagers were shocked at first, but then some of the skeptics chimed in. They claimed that this flame had no heat, that it was just a lights show. Jet asked the crowd how he should prove to them that the flame was truly so hot. One of the villagers chimed in with a suggestion.

"Hey! I've got a pot on beans sitting on my counter at home. Those beans have been sitting out in the open for five whole years now! I can't do anything to soften them up! Now, I don't just want your mule-dragon to boil them, I want him to melt them into a pool of bean soup!"

Now, none of the villagers were very smart, so they thought that this was a great idea. Jet obliged. He took his mule to this villager's house. Sure enough, a pot of dry and rock hard beans sat on the counter. Jet commanded his mule to scorch them with all he could muster. The mule let loose an incredible flame, the hottest every made on the earth, but after five minutes of intense hear, the beans didn't change one bit. They stayed just as they were before, dry and hard. Jet was astounded. The villagers all laughed at him for his fake fire-breathing mule. Jet went back to his farm and continued on with life as normal, working hard until the day he died.

This all goes to show that Jet's mule can't melt stale beans.