Climbing higher onto my aider above the hook was terrifying, but it stayed put.

WSJ: Training for the Big Wall | By Michael J. Ybarra

In many cases, the first aider can use mouth to mouth resuscitation techniques to keep the air passing in and out of the lungs.

BBC: Minutes matter

It seemed to be biting deeper, which was reassuring as I moved up a step in my aider, a webbing ladder used to ascend Big Walls.

WSJ: Training for the Big Wall | By Michael J. Ybarra

Despite the efforts of other passers-by, including trained first aider Anne-Marie Hoy who was on her way to work at a nearby care home, and an ambulance paramedic, Mr Aryaei Nekoo died before he could be taken to hospital.

BBC: Stephen Nolan

Head doorman Mark West, who was the first official first aider on the scene, told the inquest he did not know Mr Pueschel had stopped breathing and chose to eject one of his friends for being "aggressive", despite being urged to call an ambulance.

BBC: Ritzy Nightclub