Abstract: At 10:45 a.m. on February 3, 2020, an employee working as a operations analyst for a company that provides oil and gas support services was training to use the nitrogen unit in the back of the yard. The employee was exiting in and out of the equipment doghouse via a ladder. As the employee exited the doghouse, the ladder retracted backwards causing the employee to fall to the ground and land on both feet. The employee stated he felt a sharp pain in his leg and immediately fell to the ground. The abrupt second fall to the ground caused the employee to a reinjure a pre-existing condition he had in his back and required hospitalization.