Walking Through Walls Training System (US Patent Application 2006-0014125)

TL;DR — A patent application for a method of training a person to walk through walls.

How much weight it carries: A real filing at the USPTO. It is a joke, or a sincere one; either way it is not engineering.

Where this came from

• Will Manidis’s “most underrated PDF” thread, July 2023 — routing record: The Most Underrated PDF on the Internet (July 2023)

27 pages. A copy is archived locally against link rot; the header links the original source.