The Oscar-nominated actor captioned his first post: "I just realised I'm not playing Spider-Man."
The funny clip opens with Gyllenhaal reading The Amazing Spider-Man comic, titled 'The Return Of The Man Called Mysterio' and exclaiming, "Whoa! What the f**k?"
Mysterio is the antagonist in the follow-up to the 2017's "Spider-Man: Homecoming".
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