Mine has done that several times. Its like carrying around a piggy bank, all the good stuffs in there but you can't get it out. No real use in trying to break it with a hammer either, Tried that once, broke off the little peg that holds the strap but thats about it. Those things are tougher than bricks. I finally submerged it in warm watter for a couple minues, then took it out, and pried it open with a screwknife.