At approx. 10:20 AM EE went to go to the restroom. She opened office door to go out & when she stepped on the grating her foot slipped causing her to fall. Her left foot slipped out & went under the step. There was a little ice on the shaddy part of the grating. The next morning her foot was still hurting so she was sent to the Dr. & Dr. said foot was sprained & to stay off it.