I had my rear blinky fall off and explode into a dozen pieces all over a side street one day. I went back and picked up the pieces and tried to patch it al together. I needed a little help from epoxy putty to get it mounted again, but now I don't have to worry about someone stealing it off the bike while the bike is parked.
Since those pix were taken, I've fitted "proper" fenders and saddle to the bike.