If there's any poetic justice, it's the snowboarder who recently ran hard into one of our top instructors the other day at Keystone, and was taken off the mountain on a sled. That instructor is 6'5 and about 250 pounds, solid as a tree. He was uninjured. The snowboarder blew out a knee.
I've also been hit numerous times over the years, with the other party suffering far more than myself. I'll admit that I don't have much sympathy when this happens! And it doesn't help when they protest that "I was in control." "You'd better not have been," I often reply, "because that would make it intentional. It had better have been an accident."
Unfortunately, and somewhat off the topic here, I think that many accidents do happen when the person responsible actually was "in control." At least, as far as many skiers' and riders' concept of "control" goes--they were going a speed they were comfortable with, and for most people, the only thing they think of as control is speed control. So they were in control in their minds, but grossly out of control in critically important ways they hardly comprehend.
The best skiers and snowboarders use turns to control line, not speed (and they ski a line that minimizes the need to control speed). If you use your skis or board primarily as a brake (which the vast majority of recreational skiers do), not only are you not controlling your line, you cannot control your line! Braking is intentional skidding, and skidding is the enemy of line control.
Of course, for what it's worth, in addition to the myriads of sliders who cannot ever hold an edge, these days we also have a number of skiers and riders who cannot release an edge. They lock onto a pure sidecut-determined carve, with virtually no ability to shape their turn. While they aren't skidding or braking, and they are "turning," they have all the direction control of a freight train. "You were in my carve," I was once told, by a skier lying in pain on the ground after running straight into me. If you can't control your line, you are out of control!
Control of line, the ability to go precisely where you want to go, is genuine control on skis and snowboards. It is frightening how few people have ever considered that!