STEVEN TYLER OF AEROSMITH FALLING OFF THE STAGE AT STURGIS

Yet another member of AEROSMITH has gone down with an injury.

On Wednesday night, singer STEVEN TYLER fell off the stage about halfway through a gig at the annual Sturgis Motorcycle Rally in Rapid City, South Dakota.

He was airlifted to a local hospital, and treated for minor injuries to his head, neck and shoulder.

What happened was that the sound system failed during "Love in an Elevator" . . . so Steven started dancing on a catwalk to entertain the crowd.

He twirled around and stepped backward, inadvertently falling off the stage, and onto a couple fans.