Four people were arrested on Saturday for allegedly vandalizing the Skyfari Aerial Tram at the San Diego Zoo in Southern California, which left more than 100 people stranded for hours, authorities said. The four men, aged 20 to 24, were allegedly “rocking back and forth” in their gondola, officials told local media. It caused the “Skyfari” gondola system to shut down automatically, leaving the other passengers stranded for about an hour, said the San Diego Fire Department in a Twitter post, which added later that “all guests are safely on the ground.” The four men’s identities were not disclosed by police. Hussein Alhamadami and his girlfriend were among those who were stranded on the gondola. Recalling the shutdown, Alhamadami said it wasn’t clear to passengers why the ride stopped. “We were just hoping that we were going to get down soon,” Alhamadami told Fox5. “It would swing back and forth for a …