Back in DF days (which wasn't that long ago) I was doing some wrenching and test running in my pit area (remember when we could do that? :-) ) using a DSC cord. At full oomph, you guessed it. Sucked in the cord. Broke every blade off the Viojett rotor. Eventually fixed the DSC cord and discovered that I didn't really need that missing two feet anyway. As for the rotor, it was replaced with a spare.

No dangly bits are allowed near the intakes of my fire belchers.

...jim