TIL about anti ninja floors in Japan. They were purposefully made to squeak as to alert people of intruders. science.howstuffworks.com Submitted by tpb01 t3_yf8hvz 2 years ago in todayilearned 187 comments 5,566
sythingtackle t1_iu3pi3q wrote 2 years ago Must be a lot of Ninjas over in the UK cos most new build upper floors and stairs squeak Permalink 1
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