Kevin notes that the entry for xBase says you have to use Clipper to shoot yourself in the foot. But if you read a little further,you'll see:
You buy a gun. Bullets are only available from another company and are promised to work so you buy them. Then you find out that the next version of the gun is the one that is scheduled to actually shoot bullets.
That sounds like an awful lot of other products that aren't mentioned in this article too.
But I love the ones near the bottom :
You shoot yourself in the foot, but can't figure out how you did it so you find a dozen new ways to do it.
You shoot yourself in the foot and everything goes so smoothly that you go ahead to to shoot yourself in the other foot then your legs, then your torso and then your head. Problem solved.
How to Shoot Yourself in the Foot