In reply to Jacopo:
Thanks for the response. I had also seen that Ben Bransby used the same side runner (don't think I watched the Sieve Vanhee video), but I don't remember reading anything about it then either (maybe there was something that I've forgotten). I didn't mean to single you out, so apologies if I did.
Basically I was really wondering if the side runner is high enough to keep a climber off the ground if they fluffed the foot swap move and if that's been tested or not, thinking in the classic hard grit fashion of throwing a bag of rocks off the top.
Following on from that I was wondering if the grading assumes you'd hit the ground from the footswap or not, or if it's a very extreme version of 'scary but actually safe'. I have very little idea how hard Parthian Shot is physically, which I think would go some way towards answering my question. Is it an F8c and actually it's safe or is it F8a+ and death, or somewhere in-between? Is it the case that really it's two routes in one, physical E8/9/10 relatively safe with siderunner, then into an E8/9/10 relatively easy but very dangerous top section which in total adds up to roughly E10? My original understanding was that it was medium hard (for E10) but very scary/dangerous because of the dodgy flake, but also sort of ok because the flake seems to hold most of the time and I was wondering if that understanding was wrong because the siderunner (which if I remember correctly from when I did Brooks' Crack is good and looks roughly to me high enough to keep you off the ground from near the top) doesn't change the grade.
Questions aren't specifically directed at Jacopo, just anyone who knows.
Also agree with the above, definitely extra impressive to do it in summer!
Post edited at 12:00