Yeah, I've done that workout about twice in my life . . . once to do it, and once later in order NOT to have to admit to only doing it once.
Twice was enough, thank you.
I always heard the direction as: "Pick a weight you can do 10 times, and then do 20". Very, very tough. . . my hat's off to you if you did them regularly.
Personally, I hope we *don't* see it in the WOD anytime soon.