Topple failures involve the forward rotation and movement of a mass of rock, earth or debris out of a slope.
This kind of slope failure generally occurs around an axis (or point) at or near the base of the block of rock.
A good example of a site experiencing topple failures is Aldborough, UK.
A topple often results in the formation of debris or a debris cone at the base of the slope; this pile is called a talus cone. New talus cones don't have any plants growing on them. Old talus cone can have weeds and even trees on them.