OMG!!! I was in the middle of dismounting my D2X from my 200-400 on tripod, to mount my 60 Micro for a studio shot, when, for some reason, I decided to swing the camera rig around the other way on it's axis, cause the camo drape I use for birding was all twisted and it wouldn't sit still, nor could I access the tilt knob cause of all the now bunched up fabric over it. SO, like the dummy I am, I swing the rig around, not reaizing I'D ALREADY PUSHED THE MOUNT/DISMOUNT BUTTON, and BAM, I tell you BAM it went, 5ft down, right onto the ceramic floor! Talk about your heart skipping a beat! As if I haven't been through this sht enough already! Last yr, my 17-35/D2H hit the carpeted basement floor, (needing $400+ in repairs), and more recently, the 28-70/D2H was knocked to the concrete floor, with me tripping over the PC cord! Not AGAIN I said! Thankfully, it was turned off at the time, still works fine after mounting the 60. Lesson learned! Think before you leap, and kill $5000 worth of equipment! Man, I am such a Dufus!