In my model, the strike point for the Max Holland/Lost Bullet theory is on the outer arm of the traffic light assembly.
The seated shooter's left hand would have to hold the rifle with the trigger-guard housing to be clear of the pipes. Also the center of the rifle butt-plate is about four inches above the un-artictulated right shoulder. Unless the right shoulder rises some distance while pointing a rifle down, the shooter would have to standing.
This is academic as there is too much against a first shot as early as Max Holland has proposed.