According to Aljean Harmetz's "The Making of The Wizard of Oz," filming the first appearance of The Wicked Witch of the West resulted in the injury of Margaret Hamilton and stuntwoman Betty Danko.
At the beginning of the scene, The Wicked Witch appears in a red cloud of smoke. To pull this off, the crew constructed a hole beneath the set covered by a thin piece of aluminum. Danko was meant to remain inside the hole until her cue, when she would be catapulted into the red smoke. During rehearsal, a crew member fell through the aluminum, into the hole, and landed on Danko's shoulder. The stuntwoman said she could barely drive or raise her arm after the incident.
Director Victor Fleming wanted Hamilton's last line and exit to be shot together. This meant the actress had to do her own stunt. Immediately after the famous line, "I'll get you, my pretty, and your little dog, too," The Wicked Witch cackles, spins on her heels, and disappears in the cloud of smoke and roaring fire. She used the same space under the set, but an elevator replaced the catapult, which Hamilton would land on and use to descend. The first take went as planned. But after breaking for lunch, Fleming wanted another for safety.
They tried the scene four times, but things kept going wrong, and Fleming was losing his patience. Hamilton recalled him telling her, "I want this shot done right and done right now." In the next take, the flames and smoke came before she was safely below set. She suffered second-degree burns on her face and third-degree burns on her hand. To make matters worse, the green makeup covering her body was copper-based and toxic if absorbed, so Hamilton's raw, burned flesh had to be thoroughly cleaned with acetone. Years later, Hamilton remembered:
" I'll never, as long as I live, have anything that [takes] my breath away like that pain."