The Penal Code states"Deadly Force" means force that is intended or known by the actor to cause, or in the manner of its use or intended use is capable of causing death or serious bodily injury. - PC 9.014
So if someone is trapped in a burning car and the only way you can get them out is by breaking their arm (deadly force) then by this law you can do so if YOU BELIEVE their life is in imminent danger.PC 9.24(b) - A person is justified in using both force and deadly force against another when and to the degree he reasonably believes the force or deadly force is immediately necessary to preserve the others life in an emergency.
As for funny stories in my class...The instructor himself was pretty funny but I don't think we really had anything funny happen.