I think death bởi some terminal disease is the worst, because it's slow and painful (mentally and physically), and bạn have all that time to reflect on the way your life has gone and about all the things and people that you're going to lose and so on and so forth.
The scariest way to die is how I watched my father go...It's so uncommon it doesn't have a name. Basically you'll feel sick and wind up in the hospital, the tiếp theo ngày your insides will slowly shut down, the third ngày your blood becomes poisonous and every organ except your heart, brain and lungs completely shut off and a few hours after that whatever started to eat bạn from the inside reaches your brain and bạn slip into a state of unconciousness. Forever. My father's sister works with identifying diseases and all we know if that it's a bacteria, non-contagious, cause is unknown and there's only been a couple of people who've ever died from something simualar.
Note: I personally think it's the worst way to die because even if you're in hàng đầu, đầu trang physical health (like my dad), you're not immune, there is no cure hoặc antibiotics, and there appears to be no real cause.
Sorry if this is depressing, but it's my opinion. Seriously, because I would've accepted any other way for my father to die (NOT THAT I WANTED HIM TO), but the unknown is the worst I can imagine...