Two years ago I was riding up a chair over the race team training trail as they were taking down the gates and slipping the hill. One of the coaches was the last to come down from the top after they were pretty much done. He was carving magnificent arcs at moderate speed and his arm suddenly shook as he had hooked his edge in transition. He darted hard left right in to the woods and rocks, fell (intentionally) just on the edge as he slid in to the trees and a pile of rocks. He wasn't moving or responsive when the patrol put him on the sled. I've seen this scenario more than once in the past 5 years. Hooked edge is a big problem with deep sidecuts if you're near the edge of the trail. Not such a big problem with a straight ski as you tend to keep going straight instead of changing direction in a 17'-30' arc while hooked..
I've experienced that momentary helpless feeling while my edge is hooked. It doesn't happen often, but I can guarantee it will happen to me again if I continue to ski. It's just part of skiing, we all make small mistakes from time to time. Consequences differ depending on what gear we are on.