The ultimate downfall of the wicked is a total and inescapable collapse, where punishment surrounds them from every possible direction. It strikes from the heavens above and swallows them from the earth below, leaving absolutely no way out.
The punishment begins as they are brought down or rained upon from above [רד״ק, מצודת דוד, מאירי, ביאור שטיינזלץ]. As burning coals fall upon them, the primary approach among commentators is that this fire represents a direct expression of God's anger [רד״ק, אבן עזרא], or the coals of hell where the wicked will lie until their bodies are entirely consumed [רש״י]. Others suggest a direct cause-and-effect relationship, where the punishment is the natural result of their own actions. The malicious words they previously spoke are the exact source from which these burning coals now fall [מלבי״ם, מצודת דוד].
The descent continues as they are thrown into the fire. The primary approach among commentators is that God Himself casts them into these flames, a metaphor for severe and overwhelming troubles [רש״י, רד״ק, מאירי], or a fatal strike of fiery stone [אבן עזרא]. Conversely, another perspective maintains that it is their own wickedness and evil deeds that drag them down into the blaze [מצודת דוד, מלבי״ם].
This fall does not end in the fire alone, as they are plunged into deep, dark spaces. Most commentators agree that these are deep trenches, low valleys, or burial pits [רד״ק, אבן עזרא, מצודת ציון, מלבי״ם]. Some expand this concept to include hidden nets and traps waiting to ensnare them [מאירי]. A unique view suggests that this plunge is actually into a state of rebellion, thrusting them into endless wars and bitter conflicts [רש״י].
Ultimately, they reach a point of no return, completely unable to rise again. Caught in a terrifying trap where fire pours down upon them from the sky while they plunge into deep, fiery pits below, they are stripped of any chance to escape, stand up, or rebuild their lives [מלבי״ם, מצודת דוד].