A roller coaster might be a good experiment if you're looking for an extreme environment that might appeal to more of a mass market. (http://en.wikipedia.org/wi

A roller coaster might be a good experiment if you're looking for an extreme environment that might appeal to more of a mass market. (http://en.wikipedia.org/wiki/List_of_roller_coaster_rankings http://en.wikipedia.org/wiki/List_of_roller_coaster_rankings) Maybe skydiving or bungee jumping? Or you could go a different direction and attach a phone to a cat. I hear people love videos with cats ;)