Is death painful? What is clinical death?!

Is death painful? What is clinical death?

i feel death may or maynot b painful 4 person who is actually suffering from it, but it is surely painful 4 our loved ones, it is painful 4 one who really loves and care 4 us. clinical death is death of tissues. it is not death of heart as heart after death remains alive 4 some hours, and can be transplanted. death basically is death of mind and tissues. as far as physical pain is concerned if some1 meets with an accident, fire, attacks, cancer or so disease surely it will be painful. but if it happens in an instinct may be due to immunesystem or thymus gland it may or maynot be painful i think 75% not painful and 25% painful.