An actual bat was released in a Texas theater while it was screening The Batman
Looks like Austin has its very own low-stakes Riddler on the loose

In one version of Batman’s origin story, the young Bruce Wayne descends into the caves beneath his family’s manor to discover his greatest fear: A swarm of bats. This inspires him to become that which terrifies him, and he sets out on a path of unorthodox exposure therapy that involves dressing up like a giant flying rodent and driving around in a cool bat-shaped car.
With this precedent in mind, we now wait to see what future awaits all the would-be Bruce Waynes who attended a screening of The Batman last Friday only to find themselves in the company of a loose bat.
KXAN reports that an audience at the Moviehouse & Eatery in Austin, Texas were surprised by life imitating art in the form of a bat flying around their theater. When everyone figured out that the creature was not an immersive theater experiment but actually just a real loose bat, “management paused the movie and made multiple attempts to get the bat out.”