didn't Anderson do that to someone from triangle position?
Somewhat similar, but not really. What Silva did was more of a sweeping back elbow that came across his body before hitting Lutter in the head. It wasn't a straight up & down elbow like the one Jones dropped on Hamill.
Personally I'm not too upset with the finish. Them's the rules and that's the way it is, unfortunate, yes, but what can you do?