Using video iChat with my brother is like a bad game of monkey-see-monkey-do. It seems to happen whether we are talking with iDad or Niece G. He waves his finger, I copy it. I make a funny face, he does too. Luckily, I know when to stop. When Brother K attempted to use the non-existent camera delay to view a possible bald spot on the back of his head by tipping his head down and whipping it up to look at the camera, I chose not to copy.
If you see Brother K with a neck brace, ask to see his bald spot.