Optical illusion?

Hi guys, I was sent this little animation the other day but I can’t work it out.

Count the number of players, wait for the shift, then count again.

I can’t work out where the extra bloke has come from lol

Can anyone spot how they did this??

That’s freakin cool! It’s still really hard to keep track of every bit, but I’ve basically got it…

SPOILER ??

Several of them are much taller when there’s only 12, and just watch what happens to the “neck” of the guy in the bottom right as it switches to 13. And the legs of the guy on the far right end up doing double duty.

Pretty neato! I think the trick is that when there are 13, the dude on the left is basically “extra” while all the others have parts going to other dudes. I cannot really word it right but I think I get it?