Whoever commits an act in order to avert an imminent and otherwise unavoidable danger to the life, limb, liberty, honor, property or other legal interest of himself or of another does not act unlawfully if, taking into consideration all the conflicting interests, in particular the legal ones, and the degree of danger involved, the interest protected by him significantly outweighs the interest which he harms. This rule applies only if the act is an appropriate means to avert the danger.