White, meanwhile, has been in commercials for Stride, Oakley, American Express and HP where he, as an individual, is featured over his on-slope skills.

FORBES: Is Shaun White The Most Successful Action Sports Star Of All Time?

Six Russian tourists have died and two others have been injured after their snowmobile flipped over on a ski slope in north-eastern Italy, reports say.

BBC: Italy: Russian tourists die in snowmobile accident

You base this on the slippery-slope argument: selected cases may grow into casual practice over time.

ECONOMIST: Torture arguments

Or maybe it all started when the car backed up the slope of the driveway and the tires bumped over the sidewalk between the knee-high pricker hedges.

NEWYORKER: Getting Closer

Hence decades worth of hand-wringing over the Trans-Alaska Pipeline and the (current) closing of large areas of the North Slope to oil drilling.

FORBES: The Environmental Protection Agency Comes-a-Copper