69 Percent of People Think They're Hearing Something

This is one crazy illusion! Scientist Lisa DeBruine posted a GIF that was made by @IAmHappyToast on Twitter and asked users what they thought they heard. 


The gif isn't making any noise, but a vast majority of users are perceiving that it's making a thud.  


What do you think? It seems like no one knows for sure why this is happening. Just the brain playing a trick on you...

(H/T: The Chive



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