And who's to blame?

Being the navigator, I realised that when it had been Bert, I would have been very crossed with him. Bert did not seem angry. He helped me by bringing my bike down the slate of the 90-meter steep slope. Due to a very unfortunate fall in the past, I am terrified when it comes to steep descents. I mainly crouched down the narrow path. Crouching, to keep myself close to the ground just in case.
I was stupid not to have checked the route I had made but we succeeded and we continued our bike ride without further obstacles.