 "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...