Amaziah shoots his mouth at Amos, and the prophet transforms into a metallic wall! Their words transform too, the curses come back flaming. Don't shoot your mouth at a metallic wall!
The centuries-old question of the meaning of the third vision of Amos need not be a mystery any longer. The answer is in the wordplay you are about to see. Amos is the tin wall of the vision, and the vision is fulfilled when he transforms into the metallic wall.
Bible References: Amos 7:12, 17; Amos 7:7-17; Amos 7:7; Amos 7:7-8; Amos 7:9; Amos 7:7-9; Amos 7:10-17; Amos 7:11c-17f
More about the wordplay in the following academic publications:
"Structure and Meaning in the Third Vision of Amos (7:7-17)"
in the Journal of Hebrew Scriptures, 2011
Explanations for Exile in Amos
Sheffield Phoenix Press, 2021
The wordplay identification, interpretation, and idea for the video animation of Amos 7:12, 17 (made by M.E. Campos) began in a 2006 biblical interpretation class. It was a class assignment, not a class paper for which a topic is selected, references read, a thesis configured, and outlines, writing, etc. The poetic analysis assignment was to scan Amos 7 several times with very close observation. And that is when Campos discovered the chiastic structure of Amos 7.11c-17f. Marking the findings helped during the poetic analysis of the text and throughout the research.
While the ANAK was thought to be a plumb-line, the meaning is found in the ancient Near East to be tin. See the above academic publications for information and references.