Part of the reason I started the thread, it because it has happened to me, inbounds, TRide, front side black, groomed in Spring, before it froze overnight. Lost both skis, and 1 pole, slid probably 500 ft, heading straight towards trees and big bumps at high speed.
I was lucky, I have had self-arrest training with ice axe, and even taught it to students with the Colorado Mountain Club. Sometimes the snow is too hard to dig in with boots or skis (if still on) alone. Then the ski pole arrest is the only thing that will bring you to a sudden stop. First thing: check your attitude with respect to the hill, get yourself on your stomach, head up the hill, then make the arrest.
But, for those of you that have taught skier self-arrest or had it taught to you, how was it done?