It is that most joyous day that you have been waiting far too long for. The package containing that super amazing thing you ordered is finally here, and all you need to do now is open it to receive its glorious contents. In your overzealous state, you grab for the box cutter, and immediately go for that first clean cut, and slice through the side of your thumb.
The only reason that box cutters give us unfortunate situations such as that one are because the blade is locked into place. This is a problem that the Wiss Auto-Retracting Utility Knife is hoping to fix, by creating a blade that retracts as soon as the cut is finished. There is a special mechanism that will instantly sheathe the blade as soon as it is no longer in contact with the material that it is cutting. This $20 purchase is a little much as far as box cutters are concerned, but if you happen to be stuck with some bad aim with opening boxes, it may save you on some minor hospital trips.