Same here. Had a good size Snap-On bottom box go over. I only had the second from the bottom drawer open, took what I needed turned away and a about a minute later the sound of drawers sliding open and tools crashing to the floor as the box went over. Scared the bejesus out of me. If I would have been in front of that box ouch wouldn't be the only word I said. So be careful. My box at work scares me more, larger Snap-On bottom and top but is an older model that is not as deep as the newer boxes. Cheeks are clenched every time I have to move it, even with all the drawers locked.