- We begin with Harry Potter trying to read a book under his bedsheet.
- Most teenagers would keep a secret flashlight for this purpose, but Harry uses his lumos maxima spell to illuminate his wand.
- Uncle Dursley keeps checking on him, forcing him to keep his night-time activities a secret.
- The next day, Harry needs Uncle Vernon to sign a permission slip, which Vernon promises to do with Harry "behaves."
- That's going to be hard, because the Dursleys have a visitor: Vernon's sister, Marge.
- She's the Dursliest.
- She disparages Harry's dad as a drunk, and Harry defends him. He also breaks Marge's glass.
- When she continues to talk smack about Harry's parents, his magic goes haywire.
- Lights flicker and large Marge becomes even larger, inflating like the Michelin Man.
- She floats into the garden like an untethered hot-air balloon.
- If there's one thing the Dursleys are full of (that we can say while keeping this PG) it's hot air.