Answer:
Martin was similar to the girl in the film because they both felt anxious and paranoid while in the elevator, this was made obvious in the text when Martin would have rather taken the stairs even when he hurt his ankle and the lady was panicking when the button wouldn't work. They both seemed to feel very nervous around elevators, the girl was panicking when the doors wouldn't close and Martin was panicking when the old lady stepped on the elevator. The mysterious figure didn't seem like the fat lady or Martin's father, it seemed like it represented the harmful words Martin's father spoke about him. The figure could represent the coward or the fool that Martin's father makes him seem to be. Always lingering...
Both plots have a very unsettling atmosphere to them. They both have a subtle rising climax that really exceeds during the end.
The elevator teaches that you can't run away from your fears. Running just makes them harder and harder to face in the future. During the short film the lady is desperately trying to get to the next floor but no matter how hard she tries, she is forced to travel to the first floor and face the figure.
Hope I could help! <333