[leon]

Yes, I have seen my Canon 5D and 70-200mm f/2.8 lens slide off the tripod and hit a concrete floor.

My heart sank as it lay on the ground, however it took it pretty well and other than a few dents, it worked for many years there after until such time i tried to fix the lens because of some wobble feeling and stuffed it completely.

Now it is totally stuffed.

Leon