Maybe this image will help you see it...
Yes, that is an egg that weighs more than 3 ounces. It's HUGE. The egg carton won't close, not even a little bit.
Somebody is an over-achiever out there in the coop. We haven't cracked it open yet. It most likely will have two yolks. I'll report back when we do crack into it. (Tee hee.)
And here is one more picture. I just think it's kind of neat.