Those delightfully goofy William Castle promotional gimmicks
SEATTLE, WA — A recent article in the online Seattle P-I notes that while the internet has been used to promote the success of low budget films such as “Paranormal Activity” and the “The Blair Witch Project,” those of us “of a certain age” fondly recall how schlockmeister William Castle used memorable “promotional innovations” as effectively to create buzz around movies such as “House on Haunted Hill” and “The Tingler”. Many will recall the theaters - many, if not most, themselves now just memories - where we experienced “Emergo,” “Percepto,” and “Illusion-0”
William Castle didn’t just produce scary movies, he PRODUCED scary movies. To him, filming the movie was one thing, but marketing it was quite another. His promotional innovations (or “gimmicks” for you less romantic souls) earned him the title “The Schlockmeister” and he reveled in his reputation. Like a carnie barker, Castle would appear in a filmed segment before the start of each of his movies to hype the special “icing” associated with that particular film.
Read the whole article at Seattle Pi.

I know some of you have seen all of William Castle's movies,but wasn't there a gimmick for a promotional theatrical trailer of his 1965 horror classic "I Saw What You Did!",where the gimmick was during the theatrical trailer where the audience was given seat belts during the picture for their own safety where the audience fastened them during several scenes of the picture?