 CONT: When Alice is walking into the "surplus" store, she is wearing  the white lab coat that she took from the hospital. However, when  she gets into the store, walks by the gun case and takes a gun out,  she is very clearly wearing what appears to be blue jeans, lighter  colored blue jeans that you can see, though you never see her face,  just her hand pulling the gun out of the case. Yet in the next shot,  she is taking a camisole off the clothing rack and then you see her  lab coat fall to the floor, and then in the next frame, she is on  the floor spasming and she is wearing what appears to be black  jeans. The order of her "getting dressed" is reversed.