We know that before the chet (sin) of the eating of the forbidden fruit, mankind would not physically expire and die. (Death was the punishment given for the sin - B'reishis 3:19, Shabbos 55, Ramban 2:17). What about other death? Examples would include murder (let's assume unintentional) by metal, fire, ice, or falling from great heights, or drowning. I would surmise that a person would have been able to die in such forms. But does anyone have any source for this? (Either to support or reject.) All sources I'm aware of speak of "misa" - "death" in general. I don't know if they'd include a broader definition of these forms of death.
(Let me just preempt - if you're thinking of B'rachos 33a with R' Chanina ben Dosa, I don't think it's really a raya - see Rashi, really based on Yerushalmi.)