It expresses ruthlessness, aggressiveness. It is a warning not to give in to impulses. Sometimes it reveals a tendency to masochism. Generally, a cannon symbolizes dangers and fears.
see: fear and misfortune
fire: announce the birth of an outstanding person
load: you are nervous lately, before you will decide something, think first
aim: emotions are more important than your intellect, you are too aggressive and you desire revenge; you better calm down before you do something that you may regret
see a shot: the inner peace will come back
hear a shot: you will get good news, success in every sphere of life.
