(...rounds don't ricochet off fields, kids! This is supposedly timed as spring '45)
But "uh hu, we got permission to use 131 in a movie, so we definitely need to show it driving around!" With the museum's explicit restriction of not turning, as to save wear on that precious (it is!) final drive, so there you have it: an idiotic "leave-perfect-hiding-drive-fwd-drive-backward-and-lets-just-outturn-the-Fireflys-turret-by-turning-ours" game.