Story highlights An R-rated cartoon trailer was played before a recent "Finding Dory" screening

Theater exec said it was due to a last-minute movie change.

(CNN) A theater full of moviegoers in Calfornia were treated to a very unsavory surprise when a "Sausage Party" trailer was played before a recent showing of "Finding Dory."

For the first minute or so of the promo, "Sausage Party" seems like any other animated kids' movie: Happy anthropomorphic food, a sparkly soundtrack, you get the picture.

It almost makes sense that it would open for a sweet sequel about a wayward fish.

The problem is, the R-rated "Sausage Party" is DEFINITELY not for kids (did the name give it away?). Once the sunny exposition is over, the audience is treated to graphic human-on-food violence and, if you're watching the red band trailer, a fat bushel of profanity.

Needless to say, the "Finding Dory" audience at the Brenden Concord 14 in Concord, California was probably not expecting such a jarring (heh) display.

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