TIL that the 1988 film “Willow” featured a two-headed dragon called an Eborsisk, meant to be a reference to film critics Siskel and Ebert. Siskel and Ebert gave the film two thumbs down.

https://en.wikipedia.org/wiki/Willow_(film)

https://www.reddit.com/r/todayilearned/comments/151p3xs/til_that_the_1988_film_willow_featured_a/