Arterial injuries in nonpenetrating low-energy injuries to the extremities are rare but can occur when joint injuries put the vessels in traction against their immobile attachments to the long bones. The most common injuries are to the popliteal artery (because of its tethered nature proximal to the popliteal fossa) and the brachial artery (because it is tethered to the humerus proximal to the elbow). The second reported case of an aneurysm of the anterior tibial artery resulting from an inversion injury to the ankle is described.