https://www.youtube.com/watch?v=cU4TQ-mtb3w&x-yt-ts=1421914688&x-yt-cl=84503534I have made a lot of monkey fists.
The Navy way is to include little or no stone but most of it is a rolled up sock.
For practice throws it is not very dangerous , when you need to make a long throw you soak the monkey fist in water for a few minutes , it gets pretty heavy then.
Also you usually build it on the end of about sixty feet or more of small line, with experience passing a line between ship and quay is as easy as a game of catch.