"No, wait! I didn't mean..." But it is already too late. The world starts to get bigger around you, and your clothes feel looser every moment. Your hands are becoming slender and small, the hands of a child. Your pants drop down, and you look to see yourself going through puberty the wrong way - you are 13, 12, 11. "Please! Make it stop! I don't wanna be a wittle kid!"
Talking is harder, because you are suddenly missing your front teeth. 7, 6. 5. The change slows down a lot, and you kick your way free of your clothes, struggling out of the tent-like shirt. By the time you wriggle out of it, you seem to have stopped getting younger. A good thing, too, since you appear to be maybe 3 years old!
"So, Laddie." The Leprechaun grins up at you. "Understand things better now? Or should I take you back a wee bit further? Things are awfully clear and simple in a womb."