I read this one guys blog and it was really funny.

He wrote about your mom jokes. It was a story about how this kid said to him ” your mom has to go to class” so when he went to class his mom was sitting in his class. And then he said it to his teacher and his mom popped into his class. After that he went to his friend and told him about it and then his friend did not believe him so his friend said ” your mom is laughing” and then his mom started to laugh. and his friend still didn’t believe him so then he said ” your mom walks like a penguin” and his mom started to walk like a penguin.

http://academyofdiscovery.com/duhockey38/?p=5