I have a "Lezyne Alloy Drive" pump, used it once when I first bought it, July of this year, then it shook apart while on my bike. Went to use it today when fixing a flat, and poof, it's not working, came apart in my hands. The other day on a ride something on the bike started rattling, stopped, thinking it was my front tire, but discovered it was the pump, couldn't figure out what was up, it was still in the mount, hadn't been bumped or anything. So pissed.