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Old 03-10-2018, 12:13 PM   #8
Diaphone Jim
Junior Master Dwellar
 
Join Date: Sep 2007
Location: Northern California
Posts: 2,122
Yeah, those slanted stairs, a la M.C. Escher.
I can't figure the illusion but this helps some:
https://www.pinterest.com/pin/259590366005963517/

You don't walk on the slanted part. Me, I'd stay downstairs.
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