This speaks of the wicked person suddenly experiencing disaster as if he no longer had strength to walk. AT: "It will be like he no longer has the strength to walk" (See: [[rc://en/ta/man/translate/figs-metaphor]])
"his own advice makes him fall down." This speaks of the wicked person undergoing disaster as if he fell down. AT: "his own plans will lead him into disaster" (See: [[rc://en/ta/man/translate/figs-metaphor]])