Only the funny stuff!

I know that funny stuff can happen while trying get that great picture. I would like to hear about some of those things you didn't count on while trying to get that Kodak moment.
Recently,I was at the mall here locally and there is a potrait studio and we were watching a little girl getting her picture taken with a little puppy. The photographer was snapping away while this puppy was jumping up and down to lick this little girl in the face. They had this assistant pull the puppy back a couple of times to start over. It was so cute until the puppy paused for a short moment. Then this little girl starts crying. We were like "Oh no,he didn't"! and yes,that puppy did. All over that little girls dress. It wasn't funny but we just couldn't help ourselves,we moved on quickly before anyone else could see us laughing.
These are some of the things that happen in life and you just had to be there. Has this happen to one of your photo shoots?