If that's the Macrolepiota procera, it's the biggest one I've ever seen! I wonder how many hours it took for the mushroom to grow that big? They can grow so fast! I bet you had a big smile when you found that one! :D Thanks for sharing it with us. It will help us all to dream about finding our own giant mushroom! And some of us will dream that it is a delicious one, too, lol.