Fascinating, didn't know that. Definitely explains the speech we got the other day. For MQ flights the gate agent closes their portion when everyone is sent down the jetbridge, ramp closes when the bags are loaded, provided we both signed fit for duty/release on cci/acars and the fuel has been sent and agrees with the release, the load planner hits the magic button to close the flight, printer spits out the closeout and TPS, we look it over and give thumbs up for the FAs to button up. Block out is doors and brake, no pushing required.