our rule of thumb is that we will pour the first one and after that it is self serve. and they say i drink green tea but there is no benefit. it may also be argued as: space → mind. when the airplane try to descent not following the schedule flight plan driving the airplane safe to the airport or in emergency the flight plan change to the nearest safety airport driving the airplane directly to the runaway and not to the mountain that this crazy pilot want to crash and die taking with him and all the passengers our families. 