Prove that you have 11 fingers!

For this "trick" you need only your hands.

Tell your friends that you have 11 fingers, and you can prove it!

Using your right forefinger to point with, touch each finger of your left hand, counting "1, 2, 3, 4, 5". Then with your left forefinger count the fingers on your right hand, "6, 7, 8, 9, 10".
Say "Funny, I know I had 11! Let´s try again". This time count backwards, pointing to the fingers of the left hand say "10, 9, 8, 7, 6 ...". Then stop. hold up the right hand and say "Plus 5 equals 11!!" Do this quickly, without pausing!