Karma's a...well It's Funny

My 10 year old son came home today and told me that his older sister pushed his head into a brick wall. He said he had a headache. She was telling me that it was an accident (not sure about that) and at that very moment my 4 year old threw his Avatar staff. It hit the ground, bounced up and hit her in the eye. After I had stopped laughing, I explained what karma was. She was NOT happy with me. It really was funny.