Henrietta Paxton, 40, from Salisbury, Wiltshire, was in the middle of a set of squats when the barbell started to slip backwards causing a 120kg barbell to crush her spine. Henrietta Paxton, 40, from Salisbury, Wiltshire, was in the middle of a set of squats when the barbell started to slip backwards causing a 120kg barbell to crush her spine.