TIL that after Tim McLean, a passenger on a Greyhound bus was murdered, decapitated and partially cannibalized by a fellow passenger, Greyhound immediately pulled the ad with the slogan "There's a reason you've never heard of bus rage"

http://www.canada.com/windsorstar/news/story.html?id=0ae00464-9d02-416a-9ae4-08ccc246c322