Al: This will help keep your fence plumb, as well as help with spacing.
Tim: While Al's fiddling around with his plumb, I'll discuss another way to stop a pesky neighbor. You guessed it, electrical shock. To demonstrate that, we've installed an invisible doggy fence.
Al: We have?
Tim: Yes. Right through the floor here. Now, Foo Foo wears a special collar. When attached to him, it activates the fence. If Foo Foo were dumb enough to try to stray, he gets a mild, correctional shock. Grr. [yelping] Grr! [yelping] Now, this will work on that pesky neighbor... if you can get him to wear the collar. Al, won't you be my neighbor?
Al: I don't think so, Tim.