Strange cause of death.

I was watching “The Godfather, Pt. 3” and was wondering something. In one of the last scenes, a character is killed:

[spoiler] when he is stabbed in the throat with the earpiece of his own glasses. [spoiler]

My question is: Is this even possible? Has anyone ever been killed this way, or was this Coppola taking his “unique death” ideas just a little too far (By GF3, it seems that he was starting to push the limits too far on many things, and I’ll leave it at that).