People aren't nearly as safety conscious as they should be.
Or, are people just more stupid?
I don't know if they're any dumber (Niagara Falls in a barrel, anyone?), but 20 years ago no one would have been standing there recording it for YouTube.
On the show 1000 Ways to Die and incident like this is dramatized. Two criminals were looking to get away when they found a Zorb ball. They got in it and did not strap each other in. When the ball rolled down the hill they were hitting each other. Eventually they died.
The Gawker article title led me to believe this happened in the Rocky Mountains. A Deadly Rocky Mountain Slope. I was all, "Where in the Rocky Mountains is Abkhazia? Is it some Harry Potter-themed resort?