I watched a show on tv a few months ago where they actually showed a clip of using the gas chamber first on adult dogs and then puppies. (lifewithdogs.tv)
Then the researchers showed clips from all the shows, with the images restored to normal, to a new group of viewers who had no idea the study was about race. (scientificamerican.com)
Test your cat's interest level for free by showing the clip to kitty. (petpeoplesplace.com)