Parking B767 at Washington Dulles, under Marshall's instructions (young BA engineer) the jetty driver starts moving the pier before we had stopped. The marshaller (engineer) continued to beckon us forward. Following a delay while the jetty chap moved it back to its "parked" we proceeded forward and parked.
The young engineer (marshaller) arrives on the flight deck and starts lecturing me that he was in charge and I should have followed his instructions.
A very short exchange followed.....