It's an Emstrom 280. Those blades droop pretty low when spooling down. Probably not a TR strike - the stinger keeps you aware of the sweep of the TR.
I agree with several posters on this: Don't refuel AVGAS/Piston/high-tank/low-engine aircraft while running! Not an issue for Jet-fuel/turbine/low-tank/high-engine commercial operations.
I've never personally seen passenger transport operations where turbine engines are stopped to unload or load passengers. However in these cases passengers are always briefed to approach/depart the aircraft from the front, and are escorted.