I looked out the window yesterday and thought someone threw a couple cantaloupe melons in our front yard.
With all the rain lately we had a crop of giant puffball mushrooms sprout up overnight. 
How big you ask? 
Bigger than a dog's head...
 
 
He was so scared he ran back in the house and hid under the cat. (Who is also abnormally large)
 
Here he is in full lounge position: