(1)Blind spot
(3) Corrupted minds
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(4) Eye games
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(6)Face illusions
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(7)Impossible
Concentrate on the 4 small dots in the middle of the picture for about 30 secsThen look at a plain wall and start blinking. Who do you see?
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If you stare at the black + in the center, the moving dot turns to green.
Now, concentrate on the black + in the center of the picture. After a short period of time, all the pink dots will slowly disappear, and you will only see a green dot rotating - if you're lucky!