Below is an image of Claire Lomas.
She started the marathon on the same day as everyone else, but due to being paralysed from the waist down after a horse riding accident, she was told by doctors she would never walk again. Using a bionic suit, she completed the marathon in 16 days.
An amazing achievement, yet the organisers refused to give her a medal. Somewhere in the marathon rules it says that you are only eligible for a medal if you finish on the same day.