So if you wiggle a coffee cup in front of the camera, you're feeling that in your back, and amazingly, blind people got pretty good at being able to determine what was in front of the camera just by feeling it in the small of their back.
Si uno mueve una taza de café frente a la cámara, uno la siente en la espalda, y, sorprendentemente, los ciegos tienen buen desempeño detectando qué hay frente a la cámara mediante vibraciones en la parte baja de la espalda.