"Moonlight! Starlight! The Bogies will be out tonight! Give us a candle - give us a light! If you don't you'll get a fright. It's Punkie Night tonight! Time to meet - for a trick or treat! It's Punkie Night tonight! Punkie Night, Punkie Night, Punkie Night, tonight!" All of Mildred's attempts to revise her potion notes fail, and when Miss Hardbroom gives them the test of making a laughter potion, Mildred and Maud create one that's a slimy green colour - Ethel Hallow (who never worries about tests) makes one that's bright pink. Fearing the worst, they swallow the potion and wait for the results to set in. Soon, everyone's giggling as the potions do their work, except for Mildred and Maud - who discover they are invisible. Miss Hardbroom sends them to Miss Cackle's office, where Mildred is severely reprimanded, and called the Worst Witch. Mildred is determined not to get into any more trouble, but Halloween is near, and Mildred's class is chosen to put on a flying display. In a rare show of democracy, Miss Hardbroom draws the parts out of a cauldron, and Mildred is chosen to play the main character. She will have to perform fancy broomstick-flying moves. H.B. insists that Mildred's broom, stuck together with parcel tape, be replaced with Ethel's - a Slozzinger-Hazletwig. Ethel is still furious about Mildred turning her into a pig, and whispers a few words to the broomstick. The Chief Wizard, Egbert Hellibore, attends the Halloween celebration. He expects a fine presentation, in the tradition of Cackle's Academy. All goes well until Ethel's broom starts behaving in a most unorthodox way and Mildred crashes into Chief Wizard Hellibore. The ceremony is ruined and Mildred is in deep disgrace. Ethel is triumphant. That night, Mildred decides to run away...
—van_whistler@hotmail.co.uk