Gwen is unconscious after the observatory scene and the doctor says "Gideon, she needs you". From the wide angle, Gwen's right hand is clean. When Gideon sits and takes her hand (on the close angle), it's bruised and bloody.
At around 77 minutes, Gwen takes a smartphone picture of two guys, using the phone's flashlight, as the room is a bit dark; when the picture is taken, the guys look "white bright."
Later, around 1:46:00, she shows the pictures to her friend, and the guys have shadows on them.