At least that is a respectable place fall.I had a similar fall in Crowden Brook
on the second day of the Pennine Way.Thankfully I managed to patch myself up and carry on,albeit at a slow pace.It was rather embarassing as I had been a rock climber before taking up walking.
The terrain you fell down is quite steep.Probably best to scramble down it so you can make use of the hands and quickly correct a mistake before things get too serious.