Welcome and thanks for posting this—tell your brother nice catch!
Too cool--I never noticed that before! I love bloopers and mistakes and this is a good one, for sure.
One of my favorite mistakes is in Target Jimmy Olsen when Superman stops a gunman from shooting out windows, etc, in the street. The camera shot is from behind Dean, looking over his shoulder at the gunman. You can see Dean put the bullet in his mouth he's going to catch in his teeth. (Have to credit Zoomway for that one; it's another one I never would have seen without being told.)
Thanks so much!