A Walt Disney World stunt show employee died during practice, the Orlando, Fla., theme park's third worker killed on the job this summer.
Disney said the deaths weren't related, and federal investigators were treating them as separate accidents.
Anislav Varbanov, 30, suffered a head injury while rehearsing an acrobatic move in the "Indiana Jones Epic Stunt Spectacular" and died a short time later.
Earlier this month, Mark Priest, 47, died four days after being injured in "Captain Jack Sparrow's Pirate Tutorial" when he slipped and hit his head on a wall.
Last month, monorail driver Austin Wuennenberg, 21, was killed when his train and another monorail train collided.