On Cinema's Gregg Turkington made a surprise in-character appearance on Shudder's Cursed Films show
The noted film buff talked up 1981's Under The Rainbow, and served as a voice for Wizard Of Oz conspiracy theorists

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Screenshot: Shudder
Fans of Shudder’s Cursed Film series—which sees the streaming service talk to actual historians and industry insiders about the legends surrounding “cursed” film productions—were treated to a crossover surprise when the show returned for its second season this week. Said episode was centered on the famously tough filming of The Wizard Of Oz, with producers talking to the sort of people you’d expect for this kind of episode: Oz historians like John Fricke, Stephen Cox, and Aljean Harmetz; family members of cast members, including Lorna Luft and Jane Lahr; and even Adam Savage of Mythbusters, which once attempted to delve into the truth of the old “Buddy Ebsen was poisoned by the Tin Man’s paint” myth.