In the movie they claim that there were 8 women in the dorm that night, and that Richard Speck killed 7 of them and that 8th women escaped which is incorrect. There were 9 women in the dorm that night, Richard murdered 8 of them, and the 9th women escaped.
Jen comes around a dark corner with a lamp lighting the way bumping into Jim there. Jim gets startled first with the light pointing straight at him. In the darkness, he would have seen the glare of the light before it shone to his face.