Considering I'm an arts fag, I'd probably sit down and act the 7th sign. Though to escape him, I might go the Bill & Ted variation on that old bit. *shrug*
Honestly if I saw the Grim reaper or any other variation of Death (I like to think that I'd get the "Sandman" variation. At least it'd be a cheerful death.), unless it was genuinely "too early" I'd probably just accept it but try to make friends with him in the process. Why? Well, we all want to know the mysteries of death and the afterlife, do we not? Sure, I won't be able to share it with friends or family, but I'd be content dying if I could have a heart to heart with death and learn all the mysteries.