A couple weeks ago my hubby and I went out to dinner with friends. We came back to our place for a movie and dessert. I decided to make a batch of Betty Crocker brownies while we watched a movie.
I was distracted talking to my guests while I was mixing. 3 eggs, oil... check.
1/2 way though the cooking time I jumped up. I forgot to put in the 1/4 cup of water! Oh, no! I feared that I was going to serve my guests a chocolate brick. 
It came out fine though... tasted more like a chocolate cake. My guests were kind enough to gobble it down... I think that extra egg saved me.
Oh, always an adventure in the kitchen!
Sincerely, CC