Petra Williams grew up in a South Africa torn with racism.

She was bullied at school for her appearance and went on to become a school teacher, which she did not enjoy.

One could be forgiven for being surprised that as an adult, Petra is an inspiration to all she comes in contact with.

As Trevor Hahn found out.

Trevor is a visually impaired adventure and Petra bravely put her hand up to guide Trevor to the summit of Gokyo Ri, a mountain parallel to Everest.