two down and one up! Learned on this knot. Whatever climbing hitch you do use, I am a firm believer that you should be able to tie it quickly in any position, upside down, right side up, backwards and forwards or even behind your back.
Seen alot of climbers working hard to tie their hitch, and I think it is unsafe if you dont have it memorized. It should be embedded in your genetic memory to be safe IMO.