Broken 3 "$20" tripods then I bought a really nice Velbon.
2007 - I had a Sigma 100mm-300mm Macro, until one day I was shooting a Wedding. I had both zippers in the top middle of my bag, and one wasn't fully zipped. As I was walking into the Chapel, SMASH! Opps. The lens fell out of my backpack, shattered. Then I started zipping my backpacking all the way to one side.
2010 - My buddy was unloading his car and took my Canon backpack out of it, basically dropped it straight on the ground. I heard I loud noise and turned around. "Dude wtf?! Thats may camera bag!!" Opened up my bag and the UV filter on my Canon 28-135mm was cracked. Luckily the lens was ok, however the thread was dented. I eventually got the filter off however I could no longer put a filter on the lens.
2010 - I had a Canon 50mm f/1.8, cheapest lens in the world. I wouldn't recommend anyone to ever buy one. I was at the Detroit Auto show on a media badge shooting details of cars. I took through my car and everything is blurry, wtf. The entire front part of my lens popped out of the enclosure. I was able to pop it back in place however it never worked the same.