In the final scene, when Myrtle's employee picture is hung on the wall, it is crooked, leaning noticeably to the left. Midway through the scene, it is suddenly leaning slightly to the right, without anyone having gone near it.
At about 19:30, Dina's dad says "come on, Dina" but his mouth doesn't move.
Dina's dad uses Dina's employee pass to use the employee bathrooms. There is no locked area anywhere between the sales floor and the employee bathrooms.