Here's a pic of the chain from yesterday when I discovered it on the the road. The other pics didn't turn out that well.
The silver crosspiece stuck out from the opposite side (although that's hammered back in place for now).
The bad part is how it's coming off faces forward, so if it did open up more, it would get caught in everything. But it's hammered back on.... for now.
I just need to find the right chain that will replace this.