I've 'ridden' it a couple of times - once doing the Fred Whitton after the actual event but as a two day tour on my Speedmachine. I got to that point where I was balanced on a not-very-metaphorical knife-edge - unable to push the pedals hard enough to progress and without enough room to weave across the road but not wanting to just keel over sideways as there was no chance of getting a foot down - gravity won
The funniest encounter was actually when I was driving across for a climbing weekend with mates camping at Wasdale Head. At the time I had a MGF sports car and really enjoyed throwing it around on a quiet Thursday afternoon on the drive over. But driving up Hardknott I caught up with a high boxy 4WD driven with such excessive caution I thought the driver must have some problem other than the road. And the descent was even worse. Every turn he (as it turned out) stopped as if to survey the possibilities then manoevered down as if on a cliff. I don't think he ever noticed the small white car behind and I hate to imagine what would have happened had there been any upcoming traffic as he was very much taking the whole road. At some stage I got past and shot off but at the campsite that evening I recognised the car and struck up a conversation with the driver and his wife. Now I've seen some dreadful (read: unused to hills, let alone mountain passes) driving in the Alps by Dutch tourists (e.g. with caravans on narrow roads clearly marked NO CARAVANS) but this was slow and painful even by Dutch but the guy came from Devon - and wasn't an OAP by any means - he said he just couldn't get used to not seeing the road ahead.
So the moral is don't tackle Wrynose and Hardnott in high, long-bonneted 4WDs - a low nippy sports car is much better for your nerves