# Why shooting precision improves using two hands in opposing directions?

I wonder if someone knows a control theory model that explains the reason why using our two hands (typically in opposing directions) improves gun shooting precision. A similar situation seems to happen when be hold pencil between two fingers, or when we try to position a small object, or when you try to position some object with the two hands instead of just one.

Is there some general principle going on? Can someone model the situation mathematically?

Some pictures below:

• you mean shooting with a gun right? At first sight, I tried hard to imagine shooting an arrow with hands (arms) in opposing directions. Apr 21 at 21:13
• Photo / diagram? I can't imagine what you are asking other than one hand comes from the left and the other from the right. Apr 21 at 21:56
• My writing does not improve when writing with both hands on the pencil. Apr 21 at 23:07
• Thanks for the comments. I have added some pictures of the cases I had in mind. Apr 22 at 20:06
• Isn't this just because you can bring more force to bear and the forces are opposing so help to cancel out assymetries? All your examples are also biased since you could simply attribute it to some deficiency in the human hand rather than any fundamental principle. You would need to include examples of things other than hands as well. Apr 23 at 5:54