You’ve never seen Trump makes those moves.
Yet, it was discussed ad-nuaseum on many threads, here and elsewhere.
Here’s just one thread that you can take a look at....
http://www.freerepublic.com/focus/f-bloggers/3365503/posts
Show me a video clip of Trump making those moves other than when he was mocking the disabled guy. He even mimicked the guys speech which is somewhat effected.