 Zeus should be aware of the potential impacts of hosting special events on their animals, especially if these events occur outside of regular operating hours. In our study, we observed that spider monkey activity increased significantly during a late night haunted house event, suggesting that the animals may have been uncomfortable with the environment. While it is unclear whether the event was aversive or enriching, Zeus should take steps to monitor the animal's behavior before, during, and after such events in order to ensure their safety and well-being. This article was authored by Derby Proctor, Michelle Smell, and Melissa Beckett.