The bottom line is that you don't have to know anything about the aircraft from which you are jumping and too many jump pilots, that have not had the almost infinite range of mishaps under their belt, assume skydivers won't do something unexpected. I fly, used to skydive in my youth and once you've seen the aftermath of an unintentional canopy opening near an opened door at altitude, you have begin your education. More than a few people have died and caused airplanes to crash by being ripped through the side of a Cessna. I haven't heard of anything going through a tail rotor but that's probably just because helicopters are not ever the everyday jump ships. Be careful out there, other people may not be.