I hear a bright tone – ding! – and then the elevator doors open to reveal a vast cityscape stretching out before my eyes. Protruding in front of me is a wooden board, about three metres long and thirty centimetres wide – just thick enough to accommodate both of my feet, side-by-side. The task here is straightforward: just like the maritime method of execution, I’m meant to walk the plank.
First, I must step up onto the board. I tentatively put my left foot forward, seeking the raised edge. I shift my weight and bring my right foot up to the timber. What’s most surprising is the immediate physical response that I encounter: my heart beats noticeably faster beneath my ribcage, and I begin sweating. My brain has suddenly thrown my balance into question, because never before in my regular life have I found it so hard to put one foot in front of the other.