Shortly after docking, Gemini 8 experienced an uncontrolled roll due to a stuck OAMS thruster. Armstrong and Scott executed emergency procedures, undocked, shut down OAMS, and used the Reentry Control System to halt the tumble, consuming most RCS propellant and forcing an immediate abort. The crew conducted an emergency reentry and splashdown in the western Pacific, demonstrating effective crisis management and procedures that informed future missions.