My family can tell you that I hate random repetitive noises and statements.  Always have.

Today Middle Boy had a particularly bad day with this.

A ridiculous sounding whistle.  Some clapping.  Some random noises made with his mouth.

Some random sentences like "I just killed a koala bear."

Usually this is a cover for something else...what is it?  What is it?

I asked him and he doesn't know.  He "just feels like doing this."