Also depends on how the refs are feeling, we got hosed on the one against the Dolphins, I mean who had Allen at the point where they blew the play dead, it's 4th down he ain't giving up until he knew he had it, but they blew it dead so damn quick.
It's impossible because it's so close to the line and they can't just be sure either way, so you can't just give it to them when you called short, what should have happened would be they would have had to of made an actual good spot and then it would have been luck of the draw on the chains.