Lions, tigers, and other big cats used in film and television are deprived of space in which to run and all semblance of their natural environments. Instead, they are subjected to extreme confinement in small cages, and abusive training methods are typically used to suppress the instincts that make them so dangerous to humans, including their strong predatory drive. Electric shock and food and water deprivation are common training tools. When big cats grow old and are no longer useful to their trainers, they are usually cast off to seedy roadside zoos or other substandard facilities. Tigers are sometimes killed for the sale of their skins, organs, and other body parts on the black market. PETA went undercover at a big-cat training facility and documented abuse, which can be viewed here.