The end of the universe itself?

1 gram in 0.0000000000000000000000000000000000000000001 cm.
That's more than a little dense.

F = GMm/R² So are we talking about a subatomic black hole that wouldn't exist. 1 gram would do nothing regardless of how much they decrease its volume.

Do you have a graphing calculator?
Graph y = -1/x^2.
There's your "cone".

Do you mind explaining to me the point your trying to make? I dont have a calculator handy, Im at work, more or less. But if im not mistaken it will be a graph of two curves, as x approaches -infinity y approaches 0, as x approaches infinity y approaches 0, as x approaches 0 y approaches -infinity.

Edit: i see u graphed it for me.

Edit#2: Event Horizon. And thank you for wikipedia for terminology i've forgotten over the years, the concepts are fresh just not the vocabulary.