In a "how to be a stage magician" book, I saw a way to make this out of corrugated cardboard. You glued together two small rectangles of cardboard, then you cut the angled slot, just like the Swami plan. Abusive comment hidden. (Show it anyway.)
There are many other ways the world could end listed at this site:http://www.exitmundi.nl/exitmundi.htm Abusive comment hidden. (Show it anyway.)
You did notice, did you not, that the date on the article is Monday, Dec. 07, 1970? Abusive comment hidden. (Show it anyway.)
http://www.exitmundi.nl/exitmundi.htm