I think AP who would have you
check with emergency services before ordering an evacuation.
and Bandalot who thinks the legal responsibility for the disposition of the aircraft and its occupants lies with someone other than the PIC ( someone yet to be named) until the aircraft moves under its own steam are doing the pilots amongst us a favour here by getting us to think about how we consider each delegation of authority while still on the ground....ie if something unusual is happening while at the gate do we need to get out of our seat and actively control the pace and tone of the operation before going back to the nuts and bolts of pre flight procedures ( performance, briefing, flight deck set up etc) because these things will wait.