Californians in San Francisco and Los Angeles got a surprise this week when three horses and riders were seen on local beaches. But these were not just any riders; the horses were ridden by people wearing authentic Planet of the Apes costumes as part of a promotion for the newest film, Kingdom of the Planet of the Apes which is being released on May 8.

The horses seemed blasé about the whole spectacle, even though they were literally having a monkey on their back. But it was all in good fun, and passersby were quick to snap images and videos to upload to social media.