can you shock load a turbine
If you can, this goes from just plain expensive to eye wateringly expensive!
the prop is not physically connected
At the very least there will be a gearbox assembly between the two. Depending upon how the power is transmitted from the main shaft of the turbine through the gearbox, there is the potential for the whole thing to be in a pile of small pieces - the pictures clearly show that the prop was under power (even allowing that the pilot would have pulled the throttle back just as his buttocks started to clench!) and it appears to have stopped in about one eighth of a rotation, so all that kinetic energy must have gone somewhere.
the pictures clearly show that the prop was under power
Actually, that's a bit of a PPRUNE style assumption - an alternative explanation is that the prop was already just windmilling and that's why it stopped so quickly.