"Punishment?" Jon asked.
"oh I'm just kidding," she said "there's still extra credit you can do for me"
"oh! well what is it" jon inquired
"well you are gonna have to let me change something about you, since you know I also teach science, and see how the change effects you, if you choose not to take the extra credit, you will have to be punished for failing."
"so what will I have to do?"