Spring bar failure !!
OMG today I picked up my FF mod and put it on. Within 10s, it suddenly broke free and dropped from about wrist level !!
I managed to break the fall and it sort of slide down on my pants from my knee to toe.
What a relief that it didn't fall with a thud. First thing in mind was what failed. Guess what.

If I'm not wrong, it came stock with the watch.
Sent via iPhone