Another popular one – and quite unnerving if you’ve never seen it before… Close your left and eye and just focus your right eye on the tiny cross. At some point the big circle will disappear as it crosses your ‘blind spot’. If you can’t see this effect, then try sitting closer/further from the screen.
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(4 votes)

thats creepy
Ha that scared me :)
… Ah… Ugh that really freaked me out the first time :O