Reminds me of a trip I took with my wife and another couple. We were on a steep mountainside coming down switchbacks, when we came up to a blowdown about 50-100 feet from the end of a switchback. The tree was about 3' in diameter and was laying at such an angle that it was impossible to cross. There was no way to go up around it and the only option was to go downhill to the trail below. I simply turned my horse down the hill and hit the trail about 75 feet below. The other riders were afraid to do it, despite the fact that their horses wanted to follow mine. It almost caused a big, bad wreck, because they were holding back their fidgeting horses on a narrow, steep trail.
They finally dismounted and did one of the most unsafe things you can do in a situation like that. They led their horse down the hill. And I mean led, as in, in front of and below the horse, down the very steep hillside. My wife dismounted and just let her horse make his own way down to the rest.
We got through it without a major mishap, but just by the skin of our teeth, and all because they would not ride their horse down a steep hill.