The use of force is a defence that can be made when violence or force needs to be used, in an appropriate fashion, to deal with violence toward a person. The standard is that the force used must be reasonable. It must be a reasonable use of force. If the use of force is unreasonable or excessive, then that person has committed an act of violence. In the example of the bouncer, if he's trying to expel a person who is drunk and belligerent and attacking him, and he uses excessive force and the person ends up in the hospital, then that would be violent conduct or threatening conduct because it's unreasonable.
On June 7th, 2018. See this statement in context.