And thus: "And they shall spread the garment before the elders of the city" — If the witnesses of the husband were (clearly) found to be zomemin (scheming witnesses), etc.
R. Eliezer says: The words ("and they shall spread the garment") are to be taken literally (as signifying the nuptial garment).
(Devarim 22:18) "Then the elders of the city shall take the man and chastise him.": "the man": and not a minor.