The complaints that federal OSHA handled alleged housekeepers in six Hyatt hotels were exposed to hazards of slips, trips and falls and musculoskeletal injuries, among other possible violations.

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Slips, falls and trips killed 666 deaths in 2011, or about 14% of all workplace injuries, and a total of 472 workers were fatally injured after being struck by equipment or objects on the job.

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There were 11 cases, ranging from trips and slips, to a girl who hurt her arm while putting away a trampoline.

BBC: School playground