The case study discusses the concept of negligence and its defenses, particularly volenti non fit injuria. The key issue is whether Michelle can be held liable for negligence and asked to pay damages to Rebecca, or if there was a presence of volenti non fit injuria that would nullify her claims. The study highlights the importance of establishing duty of care, proximity, reasonable foreseeability, and contravention of duty of care, using the English case of Donoghue v Stevenson as an example. It also discusses the defense of volenti non fit injuria, citing cases such as ICI Ltd v Shatwell and Insurance Commissioner v Joyce. The study concludes that Rebecca's claim against Michelle would fail due to the success of volenti non fit injuria, meaning Michelle would not have to compensate her for negligence.