The Wana Elevator was being inspected. While the it was moving down, at approx 30-40', the employee tested the E-Stop while in motion. It came to an abrupt stop at approx 3:20am and was stopped until the system could be reset. The system was reset at approx 3:52am and the employee exited the elevator at approx 3:55am. It did not involve any equipment or compliance issues.