Try overlapping your fingers the way shown in the picture. Unless there's something special or wrong with my hand, I can only overlap my fingers that way from pinky to pointer. And if you look at the bottom, it looks like there's a thumb wrapping around.

Which means that's not his right hand, it's his left hand upside down. But we can see that his left hand is on the right side of the sign—it's the one with a pointer that looks like a cross between ET's finger and a penis.