They were just reminding one another not to forget to drop the drop gun. /s
The DUmmies keep calling this a ‘drop gun’ (like on TV, because that’s real), so maybe they were just yelling at the guy who was supposed to place the drop gun.
Woman, shouting, don’t do it.. etc etc etc.. and whatever she was telling him not to do, she knew he shouldn’t, but he did and got shot... so what was is she was telling him not to do?