This illustration by University of Queensland, Ochsner Clinical School graduate Dr Daniel M. Zumsteg demonstrates the mechanism of shoulder dislocation discussed in the case report "Indoor Skydiving: An Emerging Cause of Anterior Shoulder Dislocations" (doi: 10.31486/toj.21.0027). The patient is in the wind tunnel with his arms abducted and externally rotated, with the wind pushing his arms into further external rotation. When he reached for the side of the wind tunnel while attempting to exit, his left arm was forced into further external rotation, causing an anterior dislocation of the left shoulder.