Biden Zingers

For all the talk of "zingers" ahead of the 1st debate we didn't really come away with many memorable lines.  We know Romney mostly chose flat out lies over "zingers."  But ahead of the VP debate tonight I've had at least one scenario jangling around in my head.  I looked for a proper diary to make the comment in, but haven't found one, so thought I'd toss it out here and see if others have any good "Biden Zingers."