Well I just recently purchased a slightly used 100-400L from Surfkahakai and recieved it on Monday. I knew it was coming on Monday by the tracking info. So, while patiently waiting in my lazyboy for the post office to deliver my lens a fell asleep in my chair. I work the overnight shift, so I didn't go to bed cause I didn't want to miss the driver. Well I heard the knock on my door, and it scared the hell out of me, and I jump from my chair and banged my foor on the leg rest. I didn't think much of it other then it hurt alot. So two days of drueling over my new lens waiting for my first day off to go shooting, I am wondering my my foot still hurt so much. Well last night while at work, I had the exary tech shoot a quick picture of my foot. Turns out I now have a hairline fracture in my 5th metatarsal. Moral of the story, not only due L lenses hurt our wallets, but they can cause bodily harm.
P.S. The lens is still in perfect condition, and amazingly sharp based on the shots I have taken out my window.