Pixar's Up - Mushroom Cloud Patch

So, over the weekend, I took the family to see Pixar's "Up", which at least from my humble point of view, I thought was a fabulous movie with a great storyline and moral. Anyway, I digress.

While watching the credits scroll by and getting my children ready to leave, I happen to catch on the screen, a patch, you now like a scouting merit badge, that was a Mushroom Cloud. I tried to look for any other symbolism around the patch but it all scrolled to quickly by the time I noticed it.

I found this very disturbing and surprising. I am curious to know if anyone else has seen the movie or the patch during the credits. The patch will appear on the right side of the screen during the credits. I know that I wasn't mistaken, because during the ride home my wife asked me if I saw the mushroom cloud - so she saw it too...

This didn't diminish my view of the film, which was great fun, but I couldn't help but wonder if someone was trying to say something hidden there in the credits...