He got incredibly sick and was basically being put on an IV between takes to keep his fluids up. The movie is the reason he started ensuring he always had his own chef on sets after that.
He likes the movie, he knows the film is iconic and he quotes it regularly on socials, but Terminator and Conan are what made him.
Always keep in mind that for the people in the movies, it's a job. And while we may love them, sometimes our most dear and precious movies are barely remembered by the people who made them. (not the case here, just for context)