I'm almost always on a trail. Trails almost always make a more firm strip along a rock slide like that. Still, I use caution on spots like that. I walk around spots like that. They can be an avalanche, short distance and long. I'll use the bottom where it is less far to slide. I'll use those trees to climb through it. It is best to avoid that stuff, if possible. Of course, if it is fresh, it is even more unpredictable and spooky.
Still, sliding in boots might be a messed, twisted up ankle. I prefer better movement, flexibility, awareness, which are things when attempted slowly, tend to make the carpet slide out from under me in a slower motion. Rocks will roll slowly over my feet. Toe shoes are lighter and move out of harm quicker than clunky heavy hiking boots.I've used all fours to help me put less weight on any of the four points and create an escape by weight distribution. Heavy boots put more weight on a single point which can dislodge, or push rock, out from under.
Four legged animals use the same strategy of weight distribution and reactive movement to lessen the push that is needed to make the rocks give. Many get low to the ground, sometimes in ready. animal feet have flexibility, and friction strategies built in, even those with hooves.
Then, there are those slopes in the sun with dark grey rock baked to heat and burning my hands and feet through my thin soles.
Why in the heck were you climbing that dangerous pile of rubble, anyway, Free hiker dave?
Jbee