Survivor cast member Michael Skupin, 39, was attacked with pepper spray -- reputedly spritzed by an animal activist -- on Tuesday in Columbia, Mo., reports the Associated Press. There to discuss the importance of workplace safety, Skupin was reportedly splashed in the face, authorities said. Police arrested a 30-year-old man at the scene, but no one has been charged. A few others, including some children, also fell victim to the spray. They were treated on the scene. Skupin told AP that the suspect presented him with a letter indicating that the alleged attacker was acting alone, despite the fact that Skupin invoked the ire of the activist group People for the Ethical Treatment of Animals. On "Survivor: The Australian Outback" this past season, Skupin killed a pig on camera. His stint on the CBS reality show ended six weeks in, when he suffered burns from falling face-first into a fire.