losing stuff? Let's see...

Lost the important 1/2 of a PB Superflash once, had another completely jump ship and then watched as the jerk in the SUV behind me slow down, and crush it under his wheel (His comment "At least it wasn't you"). I've had a couple of improperly mounted (not locked in place) headlights fall off. My PB 5LED Beamer w/mount came off on more than one occasion (PDW's mount is compatible with the PB light, and doesn't have the lever that was coming undone). On several occasions I've had my rear pannier or bucket get bounced off. Lost the battery to my Down Low Glow when it came off mid-ride. On more than one occasion lost the NR bottle batteries that were used for my Classic Plus systems, ultimately that caused the damage that allowed water in and destroyed both batteries*.

*when I purchased the NR TriNewt, I made sure to protect it's battery from theft and damage by making my own waterbottle battery mount.