This technique is best done immediatly after waking up, those times in the night when you wake up, roll over and go back to sleep.

The idea is that you only really move your fingers for a few seconds and then fall asleep and dream that you are still moving them. You dont have to focus too hard on your fingers, just enough to allow yourself to fall asleep but remember to do your RC.

Getting up to take a pee probably woke you up too much to be able to fall back to sleep that quickly.

I have had real success with this technique and I have found that I can easily tell the moment I start dreaming because there is a loud popping noise and I begin to tingle all over.

Hope this helps.