Just Laziness

[tenderbehind]

Damn it! I knew the rear light was loose in it's bracket before I set off, but it looked fairly secure so I didn't do anything about it to make absolutely sure, when I got back the ligt had gone, dropped off somewhere in the sticks never to be seen again - by me anyway.

 

[Mussels]

I've lost 3 like that, one loose that rattled off and two where the mounting suddenly gave way and the light shot off into the distance.
Fortunately mine were cheap and now I tend to use threadlock for a rattle resistant bolt.