X in the Motif Index stands for Humor. You would think it would be an endless chapter, but actually it is not all that long. It includes jokes, lies, Münchhausen tales, and the favorite practical jokes of various tricksters ("X34. - Use of itch-producing ointment"). Among them I found a story that my grandfather used to tell... as if it happened to him.
(You know you grew up in the oral tradition when you read folktales and go "But... Grandpa told me he did that!!!")
X11. Red pepper for the slow ass
To my endless surprise, this is originally a Nasreddin Hodja story (I always knew Grandpa was a professional trickster).
The Hodja has a very stubborn donkey. He goes out to cut firewood, but the donkey refuses to move on the way home. A man rides by on a very vigorously prancing donkey, and the Hodja asks him how he made the animal move so quickly. For a small fee, the man agrees to tell the Hodja his secret.
"Once you are done loading up the firewood, buy some red pepper, and smear it on the donkey's butt. Then you'll see how fast he goes."
The Hodja does just that. The moment the red pepper starts burning, the donkey shoots down the road, running towards home. The Hodja realizes he can't keep up... so he decides to use the same trick on himself. Lo and behold, it works. The Hodja runs so fast that he overtakes the donkey, and gets home first. His wife is in the doorway, and she hears him yelling as he runs past:
"The donkey is right behind me! Please unload him while I run a couple of times around the village..."
(To be clear, my Grandpa claimed to be the other guy, not the Hodja.)
X31.2. Pig licks sleeping man’s lips: man thinks he is being kissed
X142.1. Dwarf king falls into porridge-pot at court of human king
X222. Tailor always associated with goat
X351. Music teacher charges double for those who have taken music before
X372.3. Eyedrops prescribed for stomach ache so that patient can see what he eats
X372.4.1. Man with cheeks stuffed with food operated on to remove swellings
X413. One-eyed parson in dimly lighted church joins the wrong couples
X435.3. Parson: Where was Christ when he was neither in heaven nor on earth?--He was in the willow-grove looking for a stick to beat those who ask foolish questions
X651. Battle between lice of Strassburg and of Hungary
X1280.1.1. Bumblebees imported to rout mosquitoes; the two insects crossbreed and have stingers on both ends