Hey, Dad. I finished my time machine. I managed to cobble together a dissequentialator out of an iPod, a milk jug, and some mold I had growing in a coffee mug.
That's fantastic! So are you going to save the world?
Good idea! (ahem) I mean, of course, but first I have to go down to the high school.
I see. I would imagine they want you to lecture their physics class.