He died in a two-car crash between Vegas and LA. A teenager went left of center and hit Sam and his wife (I believe they were married). I remember the news story saying that a Nevada Highway Patrolmen who responded to the scene saying Kinneson was semi-consciousness,and seemed to be talking to himself-like he was talking to God or something: he was saying things, to no one, like "Are you sure it's OK?", and "Well, if you think it's time, then I'll go", and something like that.
Being a former Baptist Preacher, maybe, despite his antics, he DID have an inside track with The Big Guy.