[Strike]

What can happen murph is that on throttling back too fast, your engine flames out, but you're still spewing a lot of fuel into the combustion chamber and essentially filling it with jetfuel. If your speed is low enough then perhaps some remaining heat and a lot of fuel vapor combined can cause it to re-ignite and thereby lighting the extra amounts of fuel inside the engine.

About the failing turbine blades, this can either be caused by blades failing under severe centrifugal forces and heat resulting in a material "creep" (elongation\deformation). Or simply bad fuel atomizing in the combustion chamber which result in burning fuel droplets escaping the combustion chamber and landing on the turbine blades causing them to melt. It does nasty things to turbine blades