"-- Not, I wish Jon were six inches tall."
There was what felt like a flash and Jon's clothes lay in a pile on the floor.
Karen, realizing what she had just done, instantly burst in tears of horror. She scrambled to her knees, digging through the clothing pile until she revealed Jon -- exactly six inches tall.
"Goddamnit!" screamed Jon, but it came out a paltry squeak.
"Oh God," pleaded Karen, "We can fix this."
"You can't undo wishes!" yelled Jon at the top of his lungs, "I'm stuck this way!"
"Please," sobbed Karen, "Let's try."
"No!" shouted Jon, "Give me the rock. You've screwed up badly enough."
Karen, willing to do anything to get Jon's forgiveness, placed the rock (now boulder-sized to Jon) at his feet.
Jon reached out to touch the rock and, for an instant, felt a desperate need to for revenge. He spoke aloud, unsure even as he began his sentence, of how it would end.
"I wish --"
