Yes, professionals trade outside the bid offer spread.Sometimes...

Yes, professionals trade outside the bid offer spread.
Sometimes over the offer price, sometimes under the bid price. It depends. If you want to scoop up stock and clear the market quickly, one pays up.
When there is no overhang, the sell pressure is gone and it runs.
I have a very good idea what I am talking about, it is you who doesnt understand how this works.
You have never been on a trading desk, if you had, you would know.