Follow the line of the white garment, it goes in front of obamas jacket. But obamas hand appears to be in the correct place. In the small picture of the whole group obamas hand and arm appear correct.
Nope. That white line of the white garment of the guy standing to 0's left goes in front of the blue coat of the guy standing directly behind 0 - he and 0 are wearing blue suits of almost but not quite the same color.
Aside from that, consider the source. Personally I consider it entirely believable that 0 would flash such a sign, most likely because he believes it.
Check out the look on his face...