Note the cracked roller barrel in this one.
In this one, several of the barrels had shattered off all together, leaving only the inner bearings. There were probably 15 links like this. As far as I can tell it all happened in one ride. The chain was about a year old, so it had seen a few hard miles on two different bikes (first frame was broken during this chain's life span).
I tell you, those Sram PC-1 single speed chains are tough.... Still, never have witnessed anything like it.