Everybody was just scrambling to try and get out of the bus, trying to get off each other - people were on top of me, I was on top of someone else and you're just trying to get out of the bus.

BBC: Wedding party injured as bus overturns in Lisburn

It was her knowledge of first aid that initially prompted her to get off her bus, thinking that she could help the victim she saw lying on the ground.

CNN: What made London Samaritan so brave