My taillight hates me. It wants to leave me all the time. 
The other week, it tried to commit suicide by jumping from my rack when I went over the lip of pavement onto a milled section. Alas, I caught it before it was smooshed by a car, and my LBS set me up with some brackets to re-attach it. This particular light, I attach to the back of the rear rack. Note the bracket on the back, for attaching lights.
Anyway, today the light again tried to commit suicide when the bracket failed, sending the light skittering across the road. Once again, I was able to rescue it. And fortunately, I was able to get home in the evening before dark. I think the bracket was aluminum, rather than steel, and thus softer and weaker. I need to hit up a hardware store for a good angle iron or something.
I love my light. So bright and flashy. I don't know why it hates me so.
2007 Seven ID8 - Bontrager InForm
2003 Klein Palomino - Terry Firefly (?)
2010 Seven Cafe Racer - Bontrager InForm
2008 Cervelo P2C - Adamo Prologue Saddle