KJ Apa says one of his closest Riverdale co-stars once punched him in the face at a strip club, but he insists it helped save him from a darker path. “He punched me in the face!” Apa recalled. Gary Gershoff/Getty ImagesThe I Still Believe actor said the pressure of constantly maintaining a shirtless physique, combined with sudden fame, fueled unhealthy habits. Apa detailed the extreme behaviors that accompanied what he described as a “gnarly” eating disorder while filming Riverdale.