Same happened to me in Liwa and I caught it on film. It was at the end of the day when everyone was setting up camps. I decided with a few others to give it one last run. Huge mistake too. Didn't ride the crest before switching I just did what mike did and it was nearly a disaster. Lesson for me was know when to quit and know your limits. From that day on if there is someone in not comfortable with I will not even entertain the idea. When I find the video I'll post a link here. After the even the adrenaline was pumping. It wasn't good.