.
Matinee (1993), starring John Goodman, as a 1950's movie promoter, who enjoys creating cheap stunts to promote his movies. Such as having guys dressed up as alien monsters, who crash though the movie screen into a crowded theatre, at the climactic moment of a sci fi / horror movie, that sends everyone screaming out of the theatre. As Goodman's character stands in the background laughing, enjoying the chaos and terror he created, watching them run screaming in every direction.
One of my favorite parts are the public service ads, one of them instructing people on proper diet in he 1950's, what to eat for breakfast, lunch and dinner, that we laughably now know is the path to quadruple bypass surgery.
https://ok.ru/video/1462096169510 ( 1 hour 39 minutes )
https://en.wikipedia.org/wiki/Matinee_(1993_film)