A turbine failure at 3600 RPM would be no fun. If the blades breach the outer shell, there would be an immediate release of energy in the form of thermal energy and the danger of scalding or lacerations by flying debris in the immediate vicinity high. Prayers for the injured.
Prayers indeed.
There was an accident at the G-E LSTG plant in Schenectady long ago; I think it was in the '60s. What failed was an alternator rotor, not a turbine. It failed at 3600 RPM, and pieces of the rotor burst out of the test housing. Three were killed, and (if memory serves) one body was never found.
One man was on top of the housing looking at a meter when it happened.