It is not an optical illusion...
It just looks like one.
It doesn't matter whether you win or lose...
That is, until you lose!
A man spies a letter lying on his doormat. It says on the envelope "DO NOT BEND ".
He spends the next 2 hours trying to figure out how to pick it up.
I never made a mistake in my life!
I thought I did once, but I was wrong.